Where to find more information
Refer to the following sources for additional information and for product and software updates. 1. ASUS websites The ASUS website provides updated information on ASUS hardware and software products. Refer to the ASUS contact information. 2. Optional documentation Your product package may include optional documentation, such as warranty flyers, that may have been added by your dealer. These documents are not part of the standard package.
Conventions used in this guide
To make sure that you perform certain tasks properly, take note of the following symbols used throughout this manual. DANGER/WARNING: Information to prevent injury to yourself when trying to complete a task. CAUTION: Information to prevent damage to the components when trying to complete a task. IMPORTANT: Instructions that you MUST follow to complete a task. NOTE: Tips and additional information to help you complete a task.

Typography

Bold text Indicates a menu or an item to select. Used to emphasize a word or a phrase. Keys enclosed in the less-than and greater-than sign means that you must press the enclosed key. Example: <Enter> means that you must press the Enter or Return key. If you must press two or more keys simultaneously, the key names are linked with a plus sign (+). Example: <Ctrl>+<Alt>+<D> Means that you must type the command exactly as shown, then supply the required item or value enclosed in brackets. Example: At the DOS prompt, type the command line: afudos /i[filename] afudos /iM3A78CM.ROM

Italics

<Key> <Key1>+<Key2>+<Key3> Command
M3A78-CM specifications summary
CPU AMD Socket AM2+ / AM2 for AMD PhenomFX / Phenom / Athlon / Sempron processor AMD Cool n Quiet Technology AMD64 architecture enables simultaneous 32-bit and 64-bit computing Supports CPU up to 140W AMD Live! Ready AMD 780V / SB700 Up to 5200 MT/s HyperTransport 3.0 interface for AM2+ CPU 2000 / 1600 MT/s for AM2 CPU Dual-channel memory architecture 4 x 240-pin DIMM slots support unbuffered ECC and non-ECC DDR2 1066*/800/667/533MHz memory modules Supports up to 8GB system memory * When you install a total memory of 4GB or more, Windows 32-bit operation system may only recognize less than 3GB. Hence, a total installed memory of less than 3GB is recommended if you are using a Windows 32-bit operation system. ** Due to AMD CPU limitation, DDRis supported by AM2+ CPU for one DIMM per channel only. *** Refer to www.asus.com or user manual for Memory QVL (Qualified Vendors List) Integrated ATI RV610-based Direct x10.0 graphics Supports maximum shared memory up to 256MB Supports DisplayPort with max. resolution up to 2560 x 1600 @60Hz Supports DVI-D with HDCP compliant with max. resolution up to 2560 x 1600 @60Hz dual-link Supports RGB with max. resolution up to 2048 x 1536 @85Hz Dual VGA output supports: RGB & DVI DVI & DP RGB & DP * To playback the HD-DVD and Blu ray Disc, we recommend system configuration above Graphic shared memory 256MB/Dual-Core CPU minimum/ Minimum 1GB memory of Dual-channel DDRor Single-channel DDR2 800.

(continued on the next page)

Chipset Front side bus

Memory

Graphics

Expansion slots 1 x PCI Express x16 slot 1 x PCI Express x1 slot 2 x PCI 2.2 slots Supports PCI Express 2.0 / 1.0 Architecture 1 x UltraDMA 133/100 connector 6 x Serial ATA 3Gb/s connectors support RAID 0, RAID 1 and RAID 10 configuration PCIE Gb LAN High Definition Audio 8-channel CODEC Supports Jack-Detect and Multistreaming Technologies Supports S/PDIF Out interface Supports up to 12 USB 2.0/1.1 ports (6 ports at mid-board, 6 ports at back panel) SFS (Stepless Frequency Selection) from 200MHz to 400MHz at 1MHz increment Adjustable DRAM voltage ASUS C.P.R. (CPU Parameter Recall) ASUS Q-Fan ASUS CrashFree BIOS3 ASUS EZ Flash2 ASUS MyLogo2 AI NET2 Express Gate 1 x PS/2 Keyboard port 1 x DVI port 1 x DisplayPort port 1 x VGA port 1 x RJ45 port 6 x USB 2.0/1.1 ports 8-channel Audio I/O ports 8Mb Flash ROM, AMI BIOS, PnP, DMI2.0, WfM2.0, ACPI2.0, SMBIOS 2.5

Storage / RAID

LAN Audio
USB ASUS overclocking features

ASUS special features

Back panel I/O ports
Internal I/O connectors 3 x USB 2.0 connectors support additional 6 USB 2.0/1.1 ports 1 x Floppy disk drive connector 1 x IDE connector 1 x COM connector 6 x SATA connectors High definition front panel audio connector 1 x system panel connector 1 x CD audio-in connector 1 x S/PDIF output connector 1 x TPM Header 1 x Printer port Power/CPU/Chassis fan connectors 24-pin EATX power connector 4-pin ATX 12V power connector User manual 1 x Serial ATA cable 1 x 2 in 1 Serial ATA power cable 1 x UltraDMA 133/100/66 cable 1 x FDD cable 1 x I/O shield uATX Form factor: 9.6 x 9.6 (24.4cm x 24.4cm) Drivers ASUS PC Probe II ASUS LiveUpdate Utility Anti-Virus software (OEM version)

Accessories

Form Factor Support DVD
*Specifications are subject to change without notice.
This chapter describes the motherboard features and the new technologies it supports.

Welcome!

Thank you for buying an ASUS M3A78-CM motherboard! The motherboard delivers a host of new features and latest technologies, making it another standout in the long line of ASUS quality motherboards! Before you start installing the motherboard, and hardware devices on it, check the items in your package with the list below.

Package contents

ASUS M3A78-CM motherboard 1 x Serial ATA signal cable 1 x 2 in 1 Serial ATA power cable 1 x Ultra DMA 133/100/66 cable 1 x FDD cable 1 x I/O shield ASUS motherboard support DVD User guide
Check your motherboard package for the following items. Motherboard Cables Accessories Application CD/DVD Documentation
If any of the above items is damaged or missing, contact your retailer.

Special features

Serial ATA 3Gb/s technology
This motherboard supports the next-generation hard drives based on the Serial ATA (SATA) 3Gb/s storage specification, delivering enhanced scalability and doubling the bus bandwidth for high-speed data retrieval and saves.

Gigabit LAN solution

The on-board LAN controller is a highly integrated Gigabit LAN controller. It is enhanced with an ACPI management function to provide efficient power management for advanced operating systems.

Max. 12 USB 2.0 ports

USB 2.0 is the latest connectivity standard for next generation components and peripherals. Backwards compatible with current USB 1.1 peripherals, USB 2.0 delivers transfer speeds up to 40 times faster at 480Mb/s, for easy connectivity and ultra-fast data transfers.
8-channel high definition audio
Enjoy high-quality sound system on your PC! The onboard 8-channel HD audio (High Definition Audio, previously codenamed Azalia) CODEC enables high-quality 192KHz/24-bit audio output, jack-detect feature, which automatically detects and identifies what types of peripherals are plugged into the audio I/O jacks and notifies users of inappropriate connection, meaning there will be no more confusion of Line-in, Line-out and Mic jacks. See pages 1-23, 1-30, and 2-27 for details.

DisplayPort

This motherboard introduces the new digital display interface standard DisplayPort. This new design features a small and user-friendly connector. It delivers higher performances of resolution, refresh rate, and color depth and improves digital display connectivity.

Express Gate

Taking only 5 seconds to go online from bootup, Express Gate is the one-stop gateway to instant fun! Its a unique motherboard built-in OS. You can utilize the most popular Instant Messengers (IM) like MSN, Skype, Google talk, QQ, and Yahoo! Messenger to keep in touch with friends, or quickly check on the weather and e-mails just before leaving your house. Whats more, the user-friendly picture manager lets you view your pictures without entering Windows at anytime!
The actual boot time depends on the system configuration. ASUS Express Gate supports file uploading from SATA HDDs, ODDs and USB drives and downloading to USB drives only.

ASUS M3A78-CM

Innovative ASUS features

ASUS CrashFree BIOS3

The ASUS CrashFree BIOS 3 allows users to restore corrupted BIOS data from a USB flash disk containing the BIOS file. See page 2-6 for details.

ASUS Q-Fan technology

The ASUS Q-Fan technology smartly adjusts the CPU fan speeds according to the system loading to ensure quiet, cool, and efficient operation. See page 233 for details.

Memory configurations

You may install 256 MB, 512 MB, 1 GB, and 2 GB unbuffered ECC/non-ECC DDR2 DIMMs into the DIMM sockets.
Recommended memory configurations
Sockets Mode Single-Channel Dual-channel (1) Dual-channel (2) DIMM_A1 Populated Populated Populated DIMM_B1 Populated Populated Populated DIMM_A2 Populated DIMM_B2 Populated

112 Pins

128 Pins
When using only one memory module, start installing the DDR2 DIMM from slot DIMM_A1 or DIMM_B1 for better overclocking capability. For dual-channel configuration (2), you may: - - install identical DIMMs in all four sockets OR install identical DIMM pair in DIMM_A1 and DIMM_B1 (yellow sockets) and another identical DIMM pair in DIMM_A2 and DIMM_B2 (black sockets)
Always use identical DDR2 DIMM pairs for dual channel mode. For optimum compatibility, we recommend that you obtain memory modules from the same vendor.
When you install a total memory of 4GB or more, Windows 32-bit operation system may only recognize less than 3GB. Hence, a total installed memory of less than 3GB is recommended if you are using a Windows 32-bit operation system. The motherboard can support 8 GB physical memory on the operating system listed below. You may install a maximum of 2 GB DIMMs on each slot. 64-bit Windows XP Professional x64 Edition Windows Vista x64 Edition
M3A78-CM Motherboard Qualified Vendors Lists (QVL) DDR2-1066MHz capability
Size 512MB 1G 1G 1G 1G 1G 1G 1G Vendor Kingston Kingston Qimonda Kingmax Transcend OCZ GEIL GEIL Part No. KVR1066D2N7/512 KHX8500D2/1G HYS64T128020EU-19F-C KLED48F-A8K15 TX1066QLJ-2GK1GB OCZ2N1066SR2DK GE22GB1066C5DC GE24GB1066C5QC CL N/A N/A 6 N/A 5 N/A Chip Brand Elpida Kingston Qimonda Kingmax Transced OCZ GEIL GEIL SS/ DS SS DS DS DS DS DS DS DS Chip No. E5108AJBG-1J-E Heat-Sink Package HYB18T512800CF19FFSS24313 KKA8FFIXF-JFS-18A Heat-Sink Package Heat-Sink Package Heat-Sink Package Heat-Sink Package DIMM support (Optional) A* B* C*

DDR2-800MHz capability

Size 1G 512MB 2G 4G 512MB 2G 2G 512MB 1G 1G 512MB 1G 512MB 1G 512MB 2G 512MB 1G 512MB 1G 2G 2G 1G 2G 1G 1G 2G 4G 1G 1G Vendor Kingston Kingston Kingston Kingston Samsung Samsung Samsung Qimonda Micron Corsair HY HY Kingmax Kingmax Apacer Apacer Transcend Transcend VDATA ADATA PSC PSC GEIL GEIL G.SKILL G.SKILL G.SKILL OCZ Elixir Part No. KHX6400D2LL/1G KVR800D2N5/512 KHX6400D2/2G KVR800D2N6/4G M378T6553GZS-CF7 M37875663QZ3-CF7 M391T5663QZ3-CF7 HYS64T64000EU-2.5-B2 MT9HTF12872AY-800E1 XMS2-6400 HYMP564U64CP8-S5 AB HYMP512U64CP8-S5 AB KLDC28F-A8KI5 KLDD48F-A8K15 78.91G91.9K5 78.A1GA0.9K4 TS128MLQ64V8J512MB 505485-1034 M2GVD6G3H3160Q1E52 M2OAD6G314170Q1E58 AL8E8F73C-8E1 AL7E8E63H-10E1K GX22GB6400DC GE28GB800C5QC F2-6400CL4D-2GBPK F2-6400CL5D-4GBPQ F2-6400CL5Q-16GNQ OCZ2VU8004GK M2Y1G64TU8HB0B-25C CL N/A N/A N/A N/A N/A N/A N/A 5 N/A N/A Chip Brand Kingston Promos Kingston Elpida Samsung Samsung Samsung Qimonda Micron Corsair Hynix Hynix Kingmax Kingmax Apacer Apacer Micron Transcend VDATA ADATA PSC PSC GEIL GEIL G.SKILL G.SKILL G.SKILL OCZ Elixir SS/ DS DS SS DS DS SS DS DS SS SS DS SS DS SS DS SS DS SS DS SS DS DS DS DS DS DS DS DS DS DS Chip No. Heat-Sink Package V59C1512804QCF25SY032406PECPA Heat-Sink Package E2108ABSE-8G-E K4T51083QG-HCF7 K4T1G084QQ-HCF7 K4T1G084QQ-HCF7(ECC) HYB18T512800B2F25FSS28380 D9HNP 7YE22(ECC) Heat-Sink Package HY5PS12821CFP-S5 HY5PS12821CFPS5 KKA8FF1XF-JFS-25A KKA8FFIXF-HFS-25A AM4B5708JQJS8E0751C AM4B5808CQJS8E0740E 7HD22 D9GMH TQ123PJF8F0801 VD29608A8A-25EG20813 AD29608A8A-25EG80810 A3R1GE3CFF734MAA0E A3R1GE3CFF750RABBP(ECC) Heat-Sink Package Heat-Sink Package Heat-Sink Package Heat-Sink Package Heat-Sink Package Heat-Sink Package Heat-Sink Package N2TU51280BE-25C802006Z1DV DIMM support (Optional) A* B* C*

Super Talent T800UB1GC4

Super Talent DS

DDR2-667MHz capability

Size Vendor Part No. KVR667D2N5/512 KVR667D2N5/1G HYS64T64000EU-3S-B2 HYS64T128020EU-3S-B2 XMS2-5400 KLCC28F-A8KB5 KLCD48F-A8KB5 78.91G92.9K5 AU01GE667C5KBGC 78.A1G9O.9K4 506010-4894 M2OAD5G314170Q1C58 M2OAD5H3J4170I1C53 AL6E8E63J-6E1 AL7E8F73C-6E1 NT512T64U88A1BY-3C GX21GB5300SX GX24GB5300LDC 8D-A3JK5MPETP LRMP512U64A8-Y5 CL N/A N/A 4 N/A N/A 5 N/A N/A N/A N/A 5 N/A Chip Brand Hynix Hynix Qimonda Qimonda Corsair Kingmax Kingmax Apacer Apacer Apacer Elpida ADATA ADATA PSC PSC Nanya GEIL GEIL PSC Hynix SS/ DS SS DS SS DS DS SS DS SS DS DS DS DS DS SS SS SS DS DS SS DS Chip No. HY5PS12821EFP-Y5 HY5PS12821EFP-Y5 HYB18T512B00B2F3SFSS28171 HYB18T512B00B2F3SFSS28171 Heat-Sink Package KKEA88B4LAUG-29DX KKEA88B4LAUG-29DX AM4B5708JQJS7E0751C AM4B5708GQJS7E0636B AM4B5808CQJS7E0749B E5108AJBG-6E-E AD29608A8A-3EG80814 AD20908A8A-3EG 30724 A3R12E3JFF717B9A00 A3R1GE3CFF734MAA0J NT5TU64M8AE-3C Heat-Sink Package Heat-Sink Package A3R12E3GEF633ACAOY HY5PS12821CFP-Y5 C 702AA DIMM support (Optional) A* B* C*

Configuring an expansion card
After installing the expansion card, configure it by adjusting the software settings. Turn on the system and change the necessary BIOS settings, if any. See Chapter 2 for information on BIOS setup. Assign an IRQ to the card. Refer to the tables on the next page. Install the software drivers for the expansion card.

Interrupt assignments

IRQ Standard Function System timer Standard 101/102-Key or Microsoft Natural Keyboard Programmable interrupt controller Standard OpenHCI USB Host Controller Communications Port (COM1) ACPI IRQ Holder for PCI IRQ Steering (free) (free) System CMOS/real time clock SCI IRQ used by ACPI bus Standard PCI Graphics Adapter (VGA) (free) Microsoft PS/2 Port Mouse Numeric data processor Primary IDE controller (single fifo) Secondary IDE controller (single fifo)
IRQ assignments for this motherboard
PCIE X1 slot PCIE X16 slot Onboard USB1.1 controller 1 Onboard USB1.1 controller 2 Onboard USB1.1 controller 3 Onboard USB1.1 controller 4 Onboard USB1.1 controller 5 Onboard USB2.0 controller 1 Onboard USB2.0 controller 2 Onboard ATI RS780 AZALIA Onboard IDE port Onboard HD audio Onboard LAN Onboard VGA Onchip SATA PCI Card1 PCI Card2 A shared shared shared shared B C shared shared shared shared shared shared D E F G shared shared shared H -
When using PCI cards on shared slots, ensure that the drivers support Share IRQ or that the cards do not need IRQ assignments; otherwise, conflicts will arise between the two PCI groups, making the system unstable and the card inoperable. 1-20 Chapter 1: Product introduction

PCI slots

The PCI slots support cards such as a LAN card, SCSI card, USB card, and other cards that comply with PCI specifications. The photo shows a LAN card installed on a PCI slot.

PCI Express x1 slot

This motherboard supports PCI Express x1 network cards, SCSI cards and other cards that comply with the PCI Express specifications. The photo shows a network card installed on the PCI Express x1 slot.

PCI Express x16 slot

This motherboard supports PCI Express x16 graphics cards that comply with PCI Express specifications. The photo shows a graphics card installed on the PCI Express x16 slot.

Jumpers

Clear RTC RAM (CLRTC) This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can clear the CMOS memory of date, time, and system setup parameters by erasing the CMOS RTC RAM data. The onboard button cell battery powers the RAM data in CMOS, which include system setup information such as system passwords. To erase the RTC RAM: 1. Turn OFF the computer and unplug the power cord. 2. Remove the onboard battery. 3. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on pins 2-3 for about 5~10 seconds, then move the cap back to pins 1-2. 4. Reinstall the battery. 5. Plug the power cord and turn ON the computer. 6. Hold down the <Del> key during the boot process and enter BIOS setup to re-enter data.
Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default position. Removing the cap will cause system boot failure!

Clear RTC

Normal (Default)
M3A78-CM Clear RTC RAM You do not need to clear the RTC when the system hangs due to overclocking. For system failure due to overclocking, use the C.P.R. (CPU Parameter Recall) feature. Shut down and reboot the system so the BIOS can automatically reset parameter settings to default values.

1.10 Connectors

1.10.1

Rear panel connectors

PS/2 keyboard port (purple). This port is for a PS/2 keyboard. Video Graphics Adapter (VGA) port. This 15-pin port is for a VGA monitor or other VGA-compatible devices. LAN (RJ-45) port. This port allows Gigabit connection to a Local Area Network (LAN) through a network hub. LAN port LED indications
Activity/Link Speed LED Status Description OFF No link ORANGE Linked BLINKING Data activity

ACT/LINK LED

Status OFF ORANGE GREEN Description 10 Mbps connection 100 Mbps connection 1 Gbps connection

SPEED LED

LAN port
Rear Speaker Out port (black). This port connects the rear speakers in a 4-channel, 6-channel, or 8-channel audio configuration.

GND RSATA_RXN2 RSATA_RXP2 GND RSATA_TXN2 RSATA_TXP2 GND
Install the Windows XP Service Pack 1 before using Serial ATA. For detailed instructions on how to configure RAID 0, RAID 1, RAID 10, and JBOD, refer to the RAID manual in the support DVD. If you intend to create a Serial ATA RAID set using these connectors, set the OnChip SATA Type item in the BIOS to [RAID]. See page 2-20 for details. If you change the OnChip SATA Type item in the BIOS to [RAID] or [AHCI], set the SATA IDE Combined Mode to [Disabled] to ensure that SATA5 and SATA6 work normally. If you want to do the task as GHOST, we suggest you connect the original disk to the SATA5 or SATA6.
GND RSATA_RXN1 RSATA_RXP1 GND RSATA_TXN1 RSATA_TXP1 GND

M3A78-CM SATA Connectors

Power, CPU, and Chassis Fan connectors (3-pin PWR_FAN, 4-pin CPU_FAN, 3-pin CHA_FAN) The fan connectors support cooling fans of 350mA~740mA (8.88W max.) or a total of 1A~2.22A (26.64W max.) at +12V. Connect the fan cables to the fan connectors on the motherboard, making sure that the black wire of each cable matches the ground pin of the connector.
Do not forget to connect the fan cables to the fan connectors. Insufficient air flow inside the system may damage the motherboard components. These are not jumpers! DO NOT place jumper caps on the fan connectors.
Only CPU Fan supports Q-Fan. CPU_FAN

GND +12V Rotation

M3A78-CM Fan Connectors
USB connectors (10-1 pin USB78, USB910, USB1112) These connectors are for USB 2.0 ports. Connect the USB module cable to any of these connectors, then install the module to a slot opening at the back of the system chassis. These USB connectors comply with USB 2.0 specification that supports up to 480 Mbps connection speed.
USB+5V USB_P10USB_P10+ GND NC
USB+5V USB_P8USB_P8+ GND NC

USB+5V USB_P7USB_P7+ GND

USB+5V USB_P9USB_P9+ GND
USB+5V USB_P11USB_P11+ GND
M3A78-CM USB 2.0 Connectors Never connect a 1394 cable to the USB connectors. Doing so will damage the motherboard! The USB 2.0 module is purchased separately.
Digital audio connector (4-1 pin SPDIF_OUT) This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port(s). Connect an HDMI module cable to this connector, then install the module to a slot opening at the back of the system chassis.
SPDIF_OUT M3A78-CM Digital Audio Connector Ensure that the audio device of Sound playback is VIA High Definition Audio (the name may be different based on the OS). Go to Start > Control Panel > Sounds and Audio Devices > Sound Playback to configure the setting.
USB+5V USB_P12USB_P12+ GND NC

GND SPDIFOUT

Front panel audio connector (10-1 pin AAFP) This connector is for a chassis-mounted front panel audio I/O module that supports either High Definition Audio or AC97 audio standard. Connect one end of the front panel audio I/O module cable to this connector.

A:\>afudos /oOLDBIOS1.rom

Main filename

Extension name
Press <Enter> The utility copies the current BIOS file to the floppy disk.
A:\>afudos /oOLDBIOS1.rom AMI Firmware Update Utility - Version 1.19 (ASUS V2.07(03.11.24BB)) Copyright (C) 2002 American Megatrends, Inc. All rights reserved. Reading flash.. done Write to file. ok A:\>
The utility returns to the DOS prompt after copying the current BIOS file.

Updating the BIOS file

To update the BIOS file using the AFUDOS utility: Visit the ASUS website at www.asus.com and download the latest BIOS file for the motherboard. Save the BIOS file to a bootable floppy disk.
Write the BIOS filename on a piece of paper. You need to type the exact BIOS filename at the DOS prompt.
Copy the AFUDOS utility (afudos.exe) from the motherboard support DVD to the bootable floppy disk you created earlier or a USB flash disk. Boot the system in DOS mode, then at the prompt type: afudos /i[filename] where [filename] is the latest or the original BIOS file on the bootable floppy disk.
A:\>afudos /iM3A78CM.rom
The utility verifies the file and starts updating the BIOS.
A:\>afudos /iM3A78CM.rom AMI Firmware Update Utility - Version 1.19(ASUS V2.07(03.11.24BB)) Copyright (C) 2002 American Megatrends, Inc. All rights reserved. WARNING!! Do not turn off power during flash BIOS Reading file. done Reading flash. done Advance Check. Erasing flash. done Writing flash. 0x0008CC00 (9%)
Do not shut down or reset the system while updating the BIOS to prevent system boot failure!
The utility returns to the DOS prompt after the BIOS update process is completed. Reboot the system from the hard disk drive.
A:\>afudos /iM3A78CM.rom AMI Firmware Update Utility - Version 1.19(ASUS V2.07(03.11.24BB)) Copyright (C) 2002 American Megatrends, Inc. All rights reserved. WARNING!! Do not turn off power during flash BIOS Reading file. done Reading flash. done Advance Check. Erasing flash. done Writing flash. done Verifying flash. done Please restart your computer

A:\>

ASUS CrashFree BIOS 3 utility
The ASUS CrashFree BIOS 3 is an auto recovery tool that allows you to restore the BIOS file when it fails or gets corrupted during the updating process. You can update a corrupted BIOS file using the motherboard support DVD , the floppy disk or the USB flash disk that contains the updated BIOS file.
Prepare the motherboard support DVD, the floppy disk or the USB flash disk containing the updated motherboard BIOS before using this utility. Ensure that you rename the original or updated BIOS file in the floppy disk or the USB flash disk to M3A78CM.ROM.

Recovering the BIOS from a floppy disk
To recover the BIOS from a floppy disk: 1. 2. 3. Turn on the system. Insert the floppy disk with the original or updated BIOS file to the floppy disk drive. The utility displays the following message and automatically checks the floppy disk for the original or updated BIOS file.
Bad BIOS checksum. Starting BIOS recovery. Checking for floppy.
When found, the utility reads the BIOS file and starts flashing the corrupted BIOS file.
Bad BIOS checksum. Starting BIOS recovery. Checking for floppy. Floppy found! Reading file M3A78CM.ROM. Completed. Start flashing.
Restart the system after the utility completes the updating process.
Recovering the BIOS from the support DVD
To recover the BIOS from the support DVD: 1. 2. 3. Remove any floppy disk from the floppy disk drive, then turn on the system. Insert the support DVD to the optical drive. The utility displays the following message and automatically checks the floppy disk for the original or updated BIOS file.
When no floppy disk is found, the utility automatically checks the optical drive for the original or updated BIOS file. The utility then updates the corrupted BIOS file.
Bad BIOS checksum. Starting BIOS recovery. Checking for floppy. Floppy not found! Checking for CD-ROM. CD-ROM found! Reading file M3A78CM.ROM. Completed. Start flashing.
The recovered BIOS may not be the latest BIOS version for this motherboard. Visit the ASUS website at www.asus.com to download the latest BIOS file.
Recovering the BIOS from the USB flash disk
To recover the BIOS from the USB flash disk: 1. 2. 3. 4. Turn on the system. The utility will automatically checks the devices for the BIOS file When found, the utility reads the BIOS file and starts flashing the corrupted BIOS file. Restart the system after the utility completes the updating process.
Only the USB flash disk with FAT 32/16 format and single partition can support ASUS CrashFree BIOS 3. The device size should be smaller than 8GB. DO NOT shut down or reset the system while updating the BIOS! Doing so can cause system boot failure! 2-
Insert the USB flash disk that contains BIOS file to the USB port.

ASUS EZ Flash 2 utility

The ASUS EZ Flash 2 feature allows you to update the BIOS without having to go through the long process of booting from a floppy disk and using a DOSbased utility. The EZ Flash 2 utility is built-in the BIOS chip so it is accessible by pressing <Alt> + <F2> during the Power-On Self Tests (POST). To update the BIOS using EZ Flash 2: 1. 2. 3. Visit the ASUS website at www.asus.com to download the latest BIOS file for the motherboard. Save the BIOS file to a floppy disk or a USB flash disk, then restart the system. You can launch the EZ Flash 2 by two methods. (1) Insert the floppy disk / USB flash disk that contains the BIOS file to the floppy disk drive or the USB port. Press <Alt> + <F2> during POST to display the following.

ASUSTek EZ Flash 2 BIOS ROM Utility V3.25 FLASH TYPE: MXIC 25L8005 Current ROM BOARD: M3A78-CM VER: 0303 (H:00 B:02) DATE: 05/30/2008 PATH: A:\ A: Update ROM BOARD: Unknown VER: Unknown DATE: Unknown
[Enter] Select or Load [Tab] Switch [Up/Down/Home/End] Move [B] Backup
[V] Drive Info [ESC] Exit

(2) Enter BIOS setup program. Go to the Tools menu then select EZ Flash2 and press <Enter>. You can switch between drives by pressing <Tab> before the correct file is found. Then press <Enter>.
When the correct BIOS file is found, EZ Flash 2 performs the BIOS update process and automatically reboots the system when done.
This function can support devices such as USB flash disk, or floppy disk with FAT 32/16 format and single partition only. DO NOT shut down or reset the system while updating the BIOS to prevent system boot failure!

ASUS Update utility

The ASUS Update is a utility that allows you to manage, save, and update the motherboard BIOS in Windows environment. The ASUS Update utility allows you to: Save the current BIOS file Download the latest BIOS file from the Internet Update the BIOS from an updated BIOS file Update the BIOS directly from the Internet, and View the BIOS version information.
This utility is available in the support DVD that comes with the motherboard package.
ASUS Update requires an Internet connection either through a network or an Internet Service Provider (ISP).

Installing ASUS Update

To install ASUS Update: 1. 2. 3. Place the support DVD in the optical drive. The Drivers menu appears. Click the Utilities tab, then click Install ASUS Update VX.XX.XX. See page 3-4 for the Utilities menu. The ASUS Update utility is copied to your system.
Quit all Windows applications before you update the BIOS using this utility.
Updating the BIOS through the Internet
To update the BIOS through the Internet: 1. Launch the ASUS Update utility from the Windows desktop by clicking Start > Programs > ASUS > ASUSUpdate > ASUSUpdate. The ASUS Update main window appears.
Select Update BIOS from the Internet option from the dropdown menu, then click Next.
Select the ASUS FTP site nearest you to avoid network traffic, or click Auto Select. Click Next.
From the FTP site, select the BIOS version that you wish to download. Click Next. Follow the screen instructions to complete the update process.
The ASUS Update utility is capable of updating itself through the Internet. Always update the utility to avail all its features.
Updating the BIOS through a BIOS file
To update the BIOS through a BIOS file: 1. 2. Launch the ASUS Update utility from the Windows desktop by clicking Start > Programs > ASUS > ASUSUpdate > ASUSUpdate. The ASUS Update main window appears. Select Update BIOS from a file option from the dropdown menu, then click Next.

System Information

Select Screen Select Item +- Change Field Tab Select Field F1 General Help F10 Save and Exit ESC Exit
v02.61 (C)Copyright 1985-2008, American Megatrends, Inc.

Sub-menu items

Navigation keys
Main Advanced Power Boot Tools Exit

Menu bar

For changing the basic system configuration For changing the advanced system settings For changing the advanced power management (APM) configuration For changing the system boot configuration For changing the system tools configuration For selecting the exit options and loading default settings
The menu bar on top of the screen has the following main items:
To select an item on the menu bar, press the right or left arrow key on the keyboard until the desired item is highlighted.
The BIOS setup screens shown in this chapter are for reference purposes only, and may not exactly match what you see on your screen. Visit the ASUS website at www.asus.com to download the latest BIOS information.
At the bottom right corner of a menu screen are the navigation keys for that particular menu. Use the navigation keys to select items in the menu and change the settings.
Some of the navigation keys differ from one screen to another.
The highlighted item on the menu bar displays the specific items for that menu. For example, selecting Main shows the Main menu items. The other items (Advanced, Power, Boot, Tools, and Exit) on the menu bar have their respective menu items.
A solid triangle before each item on any menu screen means that the iteam has a sub-menu. To display the sub-menu, select the item and press <Enter>.

Configuration fields

These fields show the values for the menu items. If an item is userconfigurable, you can change the value of the field opposite the item. You cannot select an item that is not user-configurable. A configurable field is enclosed in brackets, and is highlighted when selected. To change the value of a field, select it then press <Enter> to display a list of options. Refer to 2.2.8 Pop-up window.
At the top right corner of the menu screen is a brief description of the selected item.

Pop-up window

Select a menu item then press <Enter> to display a pop-up window with the configuration options for that item.
Main Advanced Power BIOS SETUP UTILITY Boot Tools Exit <ENTER> to select floppy type
Main Settings System Time System Date Legacy Diskette A Primary IDE Master Primary IDE Slave SATA1 SATA2 SATA3 SATA4 SATA5 SATA6 SATA Configuration [19:34:30] [Mon 11/19/2007] [1.44M, 3.5 in] Options:[Not Detected] Disabled :[Not Detected] :[Not Detected] 360K, 5.25 in. 1.2M, 5.25 in. :[Not Detected] 720K, 3.5 in. :[Not in. 1.44M, 3.5 Detected] 2.88M, 3.5 Detected] :[Not in. :[Not Detected] :[Not Detected]

System Information

This menu gives you an overview of the general system specifications. The BIOS automatically detects the items in this menu.
Main Bios Information Version :0303 Build Date :05/30/08 Processor Type :AMD Sempron(tm) Processor 3200+ Speed :1800MHz Count :1 System Memory Installed Size: 512MB Usable Size : 384MB Select Screen Select Item F1 General Help F10 Save and Exit ESC Exit BIOS SETUP UTILITY

AMI BIOS

Displays the auto-detected BIOS information.

Processor

Displays the auto-detected CPU specification.

System Memory

Displays the auto-detected system memory.

Advanced menu

The Advanced menu items allow you to change the settings for the CPU and other system devices.
Take caution when changing the settings of the Advanced menu items. Incorrect field values can cause the system to malfunction.
Main Advanced Advanced Settings Power BIOS SETUP UTILITY Boot Tools Exit Adjust System Frequency/Voltage Adjust System etc. Frequency/Voltage etc.
JumperFree Configuration CPU Configuration Chipset Onboard Devices Configuration PCIPnP USB Configuration
Select Screen Select Item +- Change Field Tab Select Field F1 General Help F10 Save and Exit ESC Exit v02.61 (C)Copyright 1985-2008, American Megatrends, Inc.

JumperFree Configuration

Select the target CPU frequency, and the relevant parameters will be auto-adjusted. Frequencies higher than CPU manufacturer recomends are not guaranteed to be stable. If the system becomes unstable, return to the default. Select Screen Select Item +- Change Field F1 General Help F10 Save and Exit ESC Exit
BIOS SETUP UTILITY Main Advanced Power Boot Tools Exit Configure System Frequency/Voltage CPU Overclocking GPU Overclocking PCIE Overclocking CPU Ratio and Voltage Processor Frequency Multiplier Processor Voltage Processor-NB Voltage Hyper Transport Configuration Hyper Transport Speed Hyper Transport Width Memory Timming and Voltage Memory Clock Mode DRAM Timing Mode Memory OverVoltage [Auto] [Auto] [Auto] [Auto] [Auto] [Auto] [Auto] [Auto] [Auto] [Auto] [Auto]

DO NOT throw the motherboard in municipal waste. This product has been designed to enable proper reuse of parts and recycling. This symbol of the crossed out wheeled bin indicates that the product (electrical and electronic equipment) should not be placed in municipal waste. Check local regulations for disposal of electronic products.
DO NOT throw the mercury-containing button cell battery in municipal waste. This symbol of the crossed out wheeled bin indicates that the battery should not be placed in municipal waste.

Safety information

Electrical safety
To prevent electrical shock hazard, disconnect the power cable from the electrical outlet before relocating the system. When adding or removing devices to or from the system, ensure that the power cables for the devices are unplugged before the signal cables are connected. If possible, disconnect all power cables from the existing system before you add a device. Before connecting or removing signal cables from the motherboard, ensure that all power cables are unplugged.
Seek professional assistance before using an adapter or extension cord. These devices could interrupt the grounding circuit. Ensure that your power supply is set to the correct voltage in your area. If you are not sure about the voltage of the electrical outlet you are using, contact your local power company.
If the power supply is broken, do not try to fix it by yourself. Contact a qualified service technician or your retailer. Before installing the motherboard and adding devices on it, carefully read all the manuals that came with the package. Before using the product, ensure that all cables are correctly connected and the power cables are not damaged. If you detect any damage, contact your dealer immediately. To avoid short circuits, keep paper clips, screws, and staples away from connectors, slots, sockets and circuitry.

Operation safety

Avoid dust, humidity, and temperature extremes. Do not place the product in any area where it may become wet. Place the product on a stable surface. If you encounter technical problems with the product, contact a qualified service technician or your retailer.

About this guide

Typography

M3A78-CM specifications summary
CPU AMD Socket AM2+ / AM2 for AMD PhenomFX / Phenom/ Athlon / Sempron processor AMD64 architecture enables simultaneous 32-bit and 64-bit computing Supports up to 140W CPU AMD Live! Ready AMD Cool n Quiet Technology AMD 780V / SB700 Up to 5200 MT/s HyperTransport 3.0 interface for AM2+ CPU 2000 / 1600 MT/s for AM2 CPU Dual-channel memory architecture 4 x 240-pin DIMM slots support unbuffered ECC and non-ECC DDR2 1066/800/667/533MHz Supports up to 8GB system memory * Due to AM2+ CPU limitation, only one DDRDIMM is supported per channel. When four DDRDIMMs are installed, all DIMMs run at 800MHz frequency by default for system stability. ** Refer to www.asus.com or user manual for Memory QVL (Qualified Vendors List) *** ue to the memory address limitation on 32-bit Windows OS, D when you install 4GB or more memory on the motherboard, the actual usable memory for the OS can be about 3GB or less. For effective use of memory, we recommend that you install a 64-bit Windows OS when having 4GB or more memory installed on the motherboard. 1 x PCI Express x16 slot 1 x PCI Express x1 slot 2 x PCI 2.2 slots Support PCI Express 2.0 / 1.0 Architecture 1 x UltraDMA 133/100 connector 6 x Serial ATA 3Gb/s connectors support RAID 0, RAID 1, RAID 0+1 configuration High Definition Audio 8-channel CODEC Supports Jack-Detect, Multistreaming Technologies, and S/PDIF Out interface Supports up to 12 USB 2.0/1.1 ports (6 ports at mid-board, 6 ports at the back panel) PCIe Gigabit LAN 1 x PS/2 Keyboard port 1 x DVI port 1 x DisplayPort port 1 x VGA port 1 x RJ45 port 6 x USB 2.0/1.1 ports 8-channel Audio I/O ports
(continued on the next page)
Chipset System bus Memory

Expansion slots

Storage / RAID Audio USB LAN Back panel I/O ports
Internal I/O connectors 3 x USB 2.0 connectors support additional 6 USB 2.0/1.1 ports 1 x Floppy disk drive connector 1 x IDE connector 1 x COM connector 6 x SATA connectors High definition front panel audio connector 1 x system panel connector 1 x CD audio-in connector 1 x S/PDIF output connector 1 x TPM Header 1 x Printer port Power/CPU/Chassis fan connectors 24-pin EATX power connector 4-pin ATX 12V power connector Integrated ATI RV610-based Direct x10.0 graphics Supports maximum shared memory up to 256MB Supports DisplayPort with max. resolution up to 2560 x 1600 @60Hz Supports DVI-D with HDCP compliant with max. resolution up to 2560 x 1600 @60Hz dual-link Supports RGB with max. resolution up to 2048 x 1536 @85Hz Dual VGA output supports: RGB & DVI, DVI & DP, and RGB & DP * o playback the HD-DVD and Blu ray Disc, we recommend T system configuration above Graphic shared memory 256MB/ Dual-Core CPU minimum/Minimum 1GB memory of Dualchannel DDRor Single-channel DDR2 800. ASUS Q-Fan ASUS CrashFree BIOS3 ASUS EZ Flash2 ASUS MyLogo2 AI NET2 Express Gate SFS (Stepless Frequency Selection) from 200MHz to 400MHz at 1MHz increment Adjustable DRAM voltage ASUS CPR (CPU Parameter Recall) 8Mb Flash ROM, AMI BIOS, PnP, DMI2.0, WfM2.0, ACPI2.0, SMBIOS 2.5 User manual 1 x Serial ATA signal cable 1 x Serial ATA power cable 1 x UltraDMA 133/100/66 cable 1 x FDD cable 1 x I/O shield uATX Form factor: 9.6 x 9.6 (24.4cm x 24.4cm) Drivers ASUS PC Probe II ASUS LiveUpdate Utilitys Anti-Virus software (OEM version)

Graphics

ASUS special features
ASUS Overclocking features BIOS Accessories

Form Factor Support DVD

*Specifications are subject to change without notice.

Chapter 1

1.1 Welcome!

Product introduction

Thank you for buying an ASUS M3A78-CM motherboard! The motherboard delivers a host of new features and latest technologies, making it another standout in the long line of ASUS quality motherboards! Before you start installing the motherboard, and hardware devices on it, check the items in your package with the list below.

Package contents

ASUS M3A78-CM motherboard 1 x Serial ATA signal cable 1 x Serial ATA power cable 1 x Ultra DMA 133/100 cable 1 x FDD cable 1 x I/O shield ASUS motherboard support DVD User manual
Check your motherboard package for the following items. Motherboard Cables Accessories Application DVD Documentations
If any of the above items is damaged or missing, contact your retailer.

Special features

Product highlights
AMD Socket AM2+ Phenom FX / Phenom / Athlon CPU support
This motherboard supports AMD Socket AM2+ multi-core processors with unique L3 cache and delivers better overclocking capabilities with less power consumption. It features dual-channel DDRmemory support and accelerates data transfer rate up to 5200MT/s via HyperTransport 3.0 based system bus.
AMD Socket AM2 Athlon / Sempron CPU support
The motherboard supports AMD Socket AM2 Athlon processors. It features 2000 / 1600 MT/s HyperTransport-based system bus, dualchannel un-buffered DDRmemory support and AMD Cool n Quiet Technology.
HyperTransport 3.0 support
HyperTransport 3.0 technology provides 2.6 times more bandwidth than HT1.0 that radically improves system efficiency for a smoother, faster computing environment.

64-bit CPU support

64-bit computing, the next generation technology to replace the current 32-bit architecture, delivers advanced system performance, faster memory access, and increased productivity. This motherboard provides excellent compatibility and flexibility by supporting either 64-bit or 32-bit architecture.

Dual-core CPU

Enjoy the extraordinary CPU power from the latest dual-core CPU. The advanced processing technology contains two physical CPU cores with individually dedicated L2 cache to satisfy the rising demand for more powerful processing capability.

Gigabit LAN solution

The onboard LAN controller is a highly integrated Gb LAN controller. It is enhanced with an ACPI management function to provide efficient power management for advanced operating systems.
AMD Cool n Quiet Technology
The motherboard supports the AMD Cool n Quiet Technology, which monitors system operation and automatically adjusts CPU voltage and frequency for a cool and quiet operating environment.

Dual channel DDRsupport

This motherboard supports DDR2 1066, which provides faster data transfer rate and more bandwidth to increase memory data transfer rate and computing efficiency. This enhances system performance in 3D graphics and other memory demanding applications.
DDRis supported by AM2+ CPU only. Refer to the ASUS website at www.asus.com for the supported CPU models. Due to AM2+ CPU limitation, only one DDRDIMM is supported per channel. When four DDRDIMMs are installed, all DIMMs run at 800MHz frequency by default for system stability.

PCI Express 2.0 support

This motherboard supports the latest PCIe 2.0 devices for double speed and bandwidth which enhances system performance.

ASUS M3A78-CM

AMD 780V
The AMD 780V Northbridge is the latest AMD chipset designed for both HT1.0 and 5200MT/s HyperTransport 3.0 (HT 3.0) interface speed and external graphics in PCI Express 2.0 standard. It features the integrated ATI RV610-based graphics and fully DirectX 10.0 compliant.

DVI Interface

DVI (Digital Visual Interface) provides high visual quality of digital display devices such as LCD monitors. The interface of this motherboard supports dual VGA output both DVI and RGB and HDCP compliant allowing playback of HD DVD and Blu-ray Disc.
To ensure high visual quality, install Windows Media Player 11 or later versions when you connect a display monitor to the DisplayPort, VGA, or DVI port, or when you connect two display monitors to any two of these three ports.

DisplayPort

This motherboard introduces the new digital display interface standard - DisplayPort. This new design features a small and user-friendly connector. It delivers higher performance of resolution, refresh rate, and color depth and improves digital display connectivity.

C.P.R. (CPU Parameter Recall)
The BIOS C.P.R. feature automatically restores the CPU default settings when the system hangs due to overclocking failure. C.P.R. eliminates the need to open the system chassis and clear the RTC data. Simply shut down and reboot the system, and the BIOS automatically restores the CPU parameters to their default settings.

Before you proceed

Take note of the following precautions before you install motherboard components or change any motherboard settings.
Unplug the power cord from the wall socket before touching any component. Before handling components, use a grounded wrist strap or touch a safely grounded object or a metal object, such as the power supply case, to avoid damaging them due to static electricity. Hold components by the edges to avoid touching the ICs on them. Whenever you uninstall any component, place it on a grounded antistatic pad or in the bag that came with the component. Before you install or remove any component, switch off the ATX power supply and detach its power cord. Failure to do so may cause severe damage to the motherboard, peripherals, or components.

Onboard LED

The motherboard comes with a standby power LED that lights up to indicate that the system is ON, in sleep mode, or in soft-off mode. This is a reminder that you should shut down the system and unplug the power cable before removing or plugging in any motherboard component. The illustration below shows the location of the onboard LED.

Motherboard overview

Placement direction
When installing the motherboard, ensure that you place it into the chassis in the correct orientation. The edge with external ports goes to the rear part of the chassis as indicated in the image below.
Place eight screws into the holes indicated by circles to secure the motherboard to the chassis.
Do not overtighten the screws! Doing so can damage the motherboard.

Screw holes

Place this side towards the rear of the chassis.

Motherboard layout

1. 2. 3. 4. 5. 6. 7. 8. 9.

Layout contents

Page 1-21 1-8 1-9 1-24 1-11 1-22 1-5 1-20 1-26 Connectors/Jumpers/Slots 10. 11. 12. 13. 14. 15. 16. 17. 18 Serial port connector (10-1 pin COM1) System panel connector (20-8 pin PANEL) Floppy disk drive connector (34-1 pin FLOPPY) TPM connector (20-1 pin TPM) Clear RTC RAM (CLRTC) USB connectors (10-1 pin USB78, USB910, USB1112) Optical drive audio connector (4-pin CD) Front panel audio connector (10-1 pin AAFP) Digital audio connector (4-1 pin SPDIF_OUT) Page 1-21 1-23 1-20 1-25 1-17 1-24 1-22 1-25 1-26
Connectors/Jumpers/Slots ATX power connectors (24-pin EATXPWR, 4-pin ATX12V) AM2/AM2+ CPU socket CPU fan connector (4-pin CPU_FAN) Power/Chassis fan connector (3-pin CHA_FAN, PWR_FAN) DDR2 DIMM slots Serial ATA connectors (7-pin SATA1-6) Onboard LED IDE connector (40-1 pin PRI_IDE) LPT connector (26-1 pin LPT)

Super Talent T800UB1GC4

Super Talent DS

DDR2-667MHz capability

Size Vendor Part No. KVR667D2N5/512 KVR667D2N5/1G HYS64T64000EU-3S-B2 HYS64T128020EU-3S-B2 XMS2-5400 KLCC28F-A8KB5 KLCD48F-A8KB5 78.91G92.9K5 AU01GE667C5KBGC 78.A1G9O.9K4 506010-4894 M2OAD5G314170Q1C58 M2OAD5H3J4170I1C53 AL6E8E63J-6E1 AL7E8F73C-6E1 NT512T64U88A1BY-3C GX21GB5300SX GX24GB5300LDC 8D-A3JK5MPETP LRMP512U64A8-Y5 CL N/A N/A 4 N/A N/A 5 N/A N/A N/A N/A 5 N/A Chip Brand Hynix Hynix Qimonda Qimonda Corsair Kingmax Kingmax Apacer Apacer Apacer Elpida ADATA ADATA PSC PSC Nanya GEIL GEIL PSC Hynix SS/ DS SS DS SS DS DS SS DS SS DS DS DS DS DS SS SS SS DS DS SS DS Chip No. HY5PS12821EFP-Y5 HY5PS12821EFP-Y5 HYB18T512B00B2F3SFSS28171 HYB18T512B00B2F3SFSS28171 Heat-Sink Package KKEA88B4LAUG-29DX KKEA88B4LAUG-29DX AM4B5708JQJS7E0751C AM4B5708GQJS7E0636B AM4B5808CQJS7E0749B E5108AJBG-6E-E AD29608A8A-3EG80814 AD20908A8A-3EG 30724 A3R12E3JFF717B9A00 A3R1GE3CFF734MAA0J NT5TU64M8AE-3C Heat-Sink Package Heat-Sink Package A3R12E3GEF633ACAOY HY5PS12821CFP-Y5 C 702AA A* DIMM support B* C* 512MB Kingston 1G 1G 1G 1G 1G 2G 1G 1G 2G 1G 1G 2G 1G Kingston Qimonda Corsair Kingmax Apacer Apacer Transcend ADATA ADATA PSC GEIL GEIL Leadmax 512MB Qimonda
512MB Kingmax 512MB Apacer

512MB PSC 512MB Nanya

512MB Twinmos

DDR2-533MHz capability

Size 512MB 1G 1G 512MB 512MB 512MB Vendor Kingston Kingston HY Elpida Transcend Kingmax Part No. KVR533D2N4/512 KVR533D2N4/1G HYMP512U64CP8-C4 AB EBE51UD8ABFA-5C-E 512MB DDRECC KLBC28F-A8KB4 CL N/A N/A 4 N/A N/A N/A Chip Brand Infineon Hynix Hynix Elpida Micron Kingmax SS/ DS SS DS DS SS SS SS Chip No. HYB18T512800AF3733336550 HY5PS12821EFP-Y5 HY5PS12821CFP-C4 E5108AB-5C-E 6ND22D9GCT(ECC) KKEA88B4IAK-37 DIMM support A* B* C*
SS - Single-sided / DS - Double - sided DIMM support: A*: Supports one module inserted into any slot as Single-channel memory configuration. B*: Supports one pair of modules inserted into both the yellow slots as one pair of Dual-channel memory configuration. C*: Supports four modules inserted into both the yellow slots and the black slots as two pairs of Dual-channel memory configuration. Visit the ASUS website at www.asus.com for the latest DDR2-533/667/800/1066MHz QVL.

Installing a DIMM

Unplug the power supply before adding or removing DIMMs or other system components. Failure to do so can cause severe damage to both the motherboard and the components.
Press the retaining clips outward to unlock a DDR2 DIMM socket. Align a DIMM on the socket such that the notch on the DIMM matches the break on the socket. 1

Unlocked retaining clip

DDR2 DIMM notch
A DDR2 DIMM is keyed with a notch so that it fits in only one direction. DO NOT force a DIMM into a socket to avoid damaging the DIMM.

This connector allows you to receive stereo audio input from sound sources such as a CD-ROM, TV tuner, or MPEG card.
Optical drive audio in connector (4-pin CD)
This connector supports several chassis-mounted functions.
System panel connector (20-8 pin PANEL)
System power LED (2-pin PLED) This 2-pin connector is for the system power LED. Connect the chassis power LED cable to this connector. The system power LED lights up when you turn on the system power, and blinks when the system is in sleep mode. Hard disk drive activity LED (2-pin IDE_LED) This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity LED cable to this connector. The IDE LED lights up or flashes when data is read from or written to the HDD. Power/Soft-off button (2-pin PWRSW) This 2-pin connector is for the system power button. Pressing the power button turns the system ON or puts the system in SLEEP or SOFT-OFF mode depending on the BIOS settings. Pressing the power switch for more than four seconds while the system is ON turns the system OFF. Reset button (2-pin RESET) This 2-pin connector is for the chassis-mounted reset button for system reboot without turning off the system power. System warning speaker (2-pin SPEAKER) This 4-pin connector is for the chassis-mounted system warning speaker. The speaker allows you to hear system beeps and warnings.
These connectors are for USB 2.0 ports. Connect the USB module cable to any of these connectors, then install the module to a slot opening at the back of the system chassis. These USB connectors comply with USB 2.0 specification that supports up to 480 Mbps connection speed.
USB connectors (10-1 pin USB78, USB910, USB1112)
Never connect a 1394 cable to the USB connectors. Doing so will damage the motherboard! The USB 2.0 module is purchased separately.
CPU, Chassis, and Power Fan connectors (4 pin CPU_FAN, 3-pin CHA_FAN, 3_pin PWR_FAN)
The fan connectors support cooling fans of 350mA~740mA (8.88W max.) or a total of 1A~2.22A (26.64W max.) at +12V. Connect the fan cables to the fan connectors on the motherboard, ensuring that the black wire of each cable matches the ground pin of the connector.
DO NOT forget to connect the fan cables to the fan connectors. Insufficient air flow inside the system may damage the motherboard components. These are not jumpers! DO NOT place jumper caps on the fan connectors. Only the CPU FAN supports ASUS Q-Fan.
10. Front panel audio connector (10-1 pin AAFP)
This connector is for a chassis-mounted front panel audio I/O module that supports either High Definition Audio or AC`97 audio standard. Connect one end of the front panel audio I/O module cable to this connector.

We recommend that you connect a high-definition front panel audio module to this connector to avail of the motherboard high-definition audio capability. By default, this connector is set to [HD Audio]. If you want to connect a High Definition front panel audio module to this connector, set the Front Panel Select item in the BIOS to [HD Audio]. See section 2.4.3 Chipset for details.
This connector supports a Trusted Platform Module (TPM) system, which can securely store keys, digital certificates, passwords, and data. A TPM system also helps enhance network security, protects digital identities, and ensures platform integrity.
TPM connector (20-1 pin TPM)
The TPM model is purchased separately!
12. Digital audio connector (4-1 pin SPDIF_OUT)
This connector is for an additional Sony/Philips Digital Interface (S/PDIF) ports.
The S/PDIF module is purchased separately.

13. LPT connector

The LPT (Line Printing Terminal) connector supports devices such as a printer. LPT standardizes as IEEE 1284, which is the parallel port interface on IBM PC-compatible computers.

1.11.1

Software support
Installing an operating system
This motherboard supports Windows XP/Vista Operating Systems (OS). Always install the latest OS version and corresponding updates to maximize the features of your hardware.
Motherboard settings and hardware options vary. Use the setup procedures presented in this chapter for reference only. Refer to your OS documentation for detailed information. Ensure that you install Windows XP Service Pack 3 or later versions/ Windows Vista Service Pack 1 or later versions before installing the drivers for better compatibility and system stability.

1.11.2

The Support DVD that comes with the motherboard package contains the drivers, software applications, and utilities that you can install to avail all motherboard features.
The contents of the Support DVD are subject to change at any time without notice. Visit the ASUS website at www.asus.com for updates.

Support DVD information

To run the Support DVD
Place the Support DVD to the optical drive. The DVD automatically displays the Drivers menu if Autorun is enabled in your computer.
Click an icon to display Support DVD/ motherboard information

Click an item to install

If Autorun is NOT enabled in your computer, browse the contents of the Support DVD to locate the file ASSETUP.EXE from the BIN folder. Double-click the ASSETUP.EXE to run the DVD.

Updating from the Internet
Select Update BIOS from the Internet, then click Next.

b. c.

Select the ASUS FTP site nearest you to avoid network traffic, or click Auto Select then click Next. From the FTP site, select the BIOS version that you wish to download then click Next.
The ASUS Update utility is capable of updating itself through the Internet. Always update the utility to avail all its features.
Updating from a BIOS file
Select Update BIOS from a file, then click Next.
Locate the BIOS file from the Open window, then click Open.
Follow the onscreen instructions to complete the updating process.
The ASUS EZ Flash 2 feature allows you to update the BIOS without having to use a bootable floppy disk or a DOSbased utility.
Before using this utility, download the latest BIOS file from the ASUS website at www.asus. com.

ASUS EZ Flash 2 utility

To update the BIOS using EZ Flash 2: 1. Insert the floppy/USB flash disk that contains the latest BIOS file to the floppy disk drive or the USB port, then launch EZ Flash 2. You can launch EZ Flash 2 in two ways. a. Press <Alt> + <F2> during POST to display the following:
ASUSTek EZ Flash 2 BIOS ROM Utility V3.32 FLASH TYPE: MXIC 25L8005 Current ROM BOARD: M3A78-CM VER: 0209 DATE: 07/01/2008 PATH: A:\ A: Update ROM BOARD: Unknown VER: Unknown DATE: Unknown
[ Enter] Select or Load [Tab] Switch [Up/Down/Home/End] Move [B] Backup [V] Drive Info [ESC] Exit
Enter the BIOS setup program. Go to the Tools menu to select EZ Flash 2 and press <Enter> to enable it. Press <Tab> to switch between drives until the correct BIOS file is found.
When the correct BIOS file is found, EZ Flash 2 performs the BIOS update process and automatically reboots the system when done.
This function can support devices such as USB flash disk, or floppy disk with FAT 32/16 format and single partition only. Do not shut down or reset the system while updating the BIOS to prevent system boot failure!
The AFUDOS utility allows you to update the BIOS file in DOS environment using a bootable floppy disk. This utility also allows you to copy the current BIOS file that you can use as backup when the BIOS fails or gets corrupted during the updating process.
Ensure that you prepare two floppy disks: the bootable floppy disk and the floppy disk containing the AFUDOS utility and the latest BIOS file. Ensure that the other floppy disk is not write-protected and has enough space to save both the AFUDOS and BIOS files. The succeeding BIOS screens are for reference only. The actual BIOS screen displays may not be the same as shown.

AFUDOS utility

Updating the BIOS file
To update the BIOS file using the AFUDOS utility: Insert the bootable floppy disk into the floppy disk drive to boot the system in DOS mode. Replace the bootable floppy disk and insert the floppy disk that contains the AFUDOS utility and the latest BIOS file.
Obtain the AFUDOS utility (afudos.exe) from the bundled support DVD and the latest BIOS file from the ASUS website at www.asus.com. We recommend that you write the BIOS filename on a piece of paper. You will need to key in the exact BIOS filename at the DOS prompt later.
At the DOS prompt, key in afudos /i[filename] where [filename] is the BIOS file in the floppy disk.
A:\>afudos /iM3A78CM.ROM

Press <Enter>.

Do not shut down or reset the system while updating the BIOS to prevent system boot failure!
The utility returns to the DOS prompt after the BIOS updating process is completed. Reboot the system from the hard disk drive.
The ASUS CrashFree BIOS 3 is an auto recovery tool that allows you to restore the BIOS file when it fails or gets corrupted during the updating process. You can update a corrupted BIOS file using the motherboard support DVD, a floppy disk, or a USB flash disk that contains the updated BIOS file.
Prepare the motherboard support DVD, the floppy disk, or the USB flash disk containing the updated motherboard BIOS before using this utility. Updating from a PATA optical drive is not supported in this motherboard. Always connect the SATA cable to the SATA1 / SATA 2 connector. Otherwise, the utility will not function.
ASUS CrashFree BIOS 3 utility

Recovering the BIOS

To recover the BIOS: 1. 2. 3. Turn on the system. Insert the floppy disk, support DVD, or USB flash disk containing BIOS file to the disk drive or port. The utility displays the following message and automatically checks the floppy disk, support DVD, or USB flash disk for the BIOS file.
Bad BIOS checksum. Starting BIOS recovery. Checking for floppy.
When found, the utility reads the BIOS file and starts erasing the corrupted BIOS file.
Bad BIOS checksum. Starting BIOS recovery. Checking for floppy. Floppy found! Reading file M3A78CM.ROM. Completed. Start erasing.
Restart the system after the utility completes the updating process.
Only the USB flash disk with FAT 32/16 format and single partition can support ASUS CrashFree BIOS 3. The device size should be smaller than 8GB. DO NOT shut down or reset the system while updating the BIOS! Doing so can cause system boot failure! The utility automatically checks the floppy disk first. If no floppy disk is found, the utility then checks the optical drive and the USB flash disk. The recovered BIOS may not be the latest BIOS version for this motherboard. Download the latest BIOS file from the ASUS website at www.asus.com.

While entering Setup, the BIOS automatically detects the presence of IDE/SATA devices. There is a separate submenu for each IDE/SATA device. Select a device item then press <Enter> to display the IDE/SATA device information. The BIOS automatically detects the values opposite the dimmed items (Device, Vendor, Size, LBA Mode, Block Mode, PIO Mode, Async DMA, Ultra DMA, and SMART monitoring). These values are not user-configurable. These items show Not Detected if no IDE/SATA device is installed in the system.
Primary IDE Master/Slave and SATA 1~6

Type [Auto]

Selects the type of IDE drive. Setting to [Auto] allows automatic selection of the appropriate IDE device type. Select [CDROM] if you are specifically configuring a CD-ROM drive. Select [ARMD] (ATAPI Removable Media Device) if your device is either a ZIP, LS-120, or MO drive. Configuration options: [Not Installed] [Auto] [CDROM] [ARMD]
This item does not appear when you select the SATA 1/2/3/4/5/6 devices.

LBA/Large Mode [Auto]

Enables or disables the LBA mode. Setting to [Auto] enables the LBA mode if the device supports this mode, and if the device was not previously formatted with LBA mode disabled. Configuration options: [Disabled] [Auto]
Block (Multi-Sector Transfer) M [Auto]
Enables or disables data multi-sectors transfers. When set to [Auto], the data transfer from and to the device occurs multiple sectors at a time if the device supports multi-sector transfer feature. When set to [Disabled], the data transfer from and to the device occurs one sector at a time. Configuration options: [Disabled] [Auto]

PIO Mode [Auto]

Selects the PIO mode. Configuration options: [Auto] [0] [1] [2] [3] [4]

DMA Mode [Auto]

Selects the DMA mode. Configuration options: [Auto]

SMART Monitoring [Auto]

Sets the Smart Monitoring, Analysis, and Reporting Technology. Configuration options: [Auto] [Disabled] [Enabled]
32Bit Data Transfer [Enabled]
Enables or disables 32-bit data transfer. Configuration options: [Disabled] [Enabled]
This menu allows you to configure the SATA devices.

SATA Configuration

OnChip SATA Channel [Enabled] OnChip SATA Type [SATA]
Enables or disables the OnChip SATA Channel. Configuration options: [Enabled] [Disabled] Allows you to select the SATA type. Configuration options: [SATA] [RAID] [AHCI]

Exit & Save Changes

Once you are finished making your selections, choose this option from the Exit menu to ensure the values you selected are saved to the CMOS RAM. An onboard backup battery sustains the CMOS RAM so it stays on even when the PC is turned off. When you select this option, a confirmation window appears. Select OK to save changes and exit.
If you attempt to exit the Setup program without saving your changes, the program prompts you with a message asking if you want to save your changes before exiting. Press <Enter> to save the changes while exiting.
Exit & Discard Changes
Select this option only if you do not want to save the changes that you made to the Setup program. If you made changes to fields other than System Date, System Time, and Password, the BIOS asks for a confirmation before exiting.

Discard Changes

This option allows you to discard the selections you made and restore the previously saved values. After selecting this option, a confirmation appears. Select OK to discard any changes and load the previously saved values.

Load Setup Defaults

This option allows you to load the default values for each of the parameters on the Setup menus. When you select this option or if you press <F5>, a confirmation window appears. Select OK to load default values. Select Exit & Save Changes or make other changes before saving the values to the non-volatile RAM.