I heard that KYROII based graphics cards, such as 3D Prophet 4500, can cause the frying of motherboards based on i845 and i850. This assumption is wrong. 3D Prophet 4500 works perfectly with motherboards based i845 and i850, the typical motherboards controllers for Pentium 4. Actually, motherboards based on i845 and i850 are AGP 4X, 2X, 1X, supporting only 1.5 volts AGP signals. An AGP 4X graphics board delivers 1.5 volt AGP signals; an AGP 2X graphics board (typically 3D Prophet 4500) can actually deliver both 1.5 and 3.3 volt AGP signal. If the motherboard is based on I845 or I850, then 3D Prophet 4500 will automatically deliver 1.5 volt AGP signals. The 3D Prophet 4500 has been successfully tested on the following motherboards for Pentium 4: Intel 850 AOpen AX4T Asus P4T Gigabyte GA-8TX Intel D850GB MSI MS-6339 Intel 845 Epox 4B2A2 MSI MS-6529(845 Pro) MSI MS-6528(845 Pro2) Gigabyte GA-8IDMLC Intel D845WN

Overview

Troubleshooting & Technical Support

Hardware Installation

Drivers & Utilities

AWARD BIOS Setup

Glossary

Online Manual

DOC. NO.: AX4T2-OL-E0110A

AX4T II

W h a t s i n t h i s m a n u a l

AX4T II.....1

Whats in this manual.....2 You Must Notice.....8 Before You Start.....9 Overview......10 Feature Highlight..... 11 Quick Installation Procedure.....14 Motherboard Map......15 Block Diagram......16
Hardware Installation....17
About Optional and Upgrade Optional....18 JP14 Clear CMOS Data.....19 CPU Installation.....20 CPU Jumper-less Design.....22 CPU and Housing Fan Connector (with H/W Monitoring)....25 RIMM Sockets......27 Front Panel Connector.....31 ATX Power Connector.....32
AC Power Auto Recovery.....33 IDE, Floppy AND IDE RAID (Optional) Connector....34 JP7 Raid Select Jumper (Optional).....36 IrDA Connector.....37 AGP (Accelerated Graphic Port) Pro Expansion Slot....38 CNR (Communication and Network Riser) Expansion Slot....39 Support Intel PRO/100 Network Connection (Optional)...40 PC99 Color Coded Back Panel....41 Support 2nd USB Port......42 Chassis Intrusion Sensor.....43 CD Audio Connector.....44 Modem Audio Connector.....45 Front Audio Connector.....46 Battery-less and Long Life Design....47 Over-current Protection.....48 Hardware Monitoring......49 Resettable Fuse.....50 Low ESR Capacitor.....51 Layout (Frequency Isolation Wall)....53
Pure Aluminum Heatsink.....54

Driver and Utility....55

Auto-run Menu from Bonus CD Disc....56 Eliminate ? mark from Windows 95/98....57 Installing Intel IAA Driver.....58 Installing Onboard LAN Driver (Optional).....59 Installing Onboard Sound Driver....60 Installing Hardware Monitoring Utility....61 ACPI Suspend to Hard Drive.....62 ACPI Suspend to RAM (STR).....66

AWARD BIOS.....68

About BIOS Function Description....69 How To Use Award BIOS Setup Program....70 How To Enter BIOS Setup.....72 BIOS Upgrade......73

Overclocking.....75

VGA Card & Hard Disk.....76

Glossary.....77

AC97......77
ACPI (Advanced Configuration & Power Interface)....77 AGP (Accelerated Graphic Port)....77 AMR (Audio/Modem Riser).....78 AOpen Bonus Pack CD.....78 APM (Advanced Power Management).....78 ATA (AT Attachment).....78 ATA/66......78 ATA/100......79 BIOS (Basic Input/Output System).....79 Bus Master IDE (DMA mode).....79 CNR (Communication and Networking Riser)....79 CODEC (Coding and Decoding)....80 DDR (Double Data Rated) SDRAM.....80 DIMM (Dual In Line Memory Module)....80 DMA (Direct Memory Access).....80 ECC (Error Checking and Correction)....81 EDO (Extended Data Output) Memory.....81 EEPROM (Electronic Erasable Programmable ROM)....81 EPROM (Erasable Programmable ROM)....81
EV6 Bus.....82 FCC DoC (Declaration of Conformity)....82 FC-PGA (Flip Chip-Pin Grid Array).....82 Flash ROM......82 FSB (Front Side Bus) Clock....83 I2C Bus.....83 IEEE 1394.....83 Parity Bit.....84 PBSRAM (Pipelined Burst SRAM)....84 PC-100 DIMM.....84 PC-133 DIMM.....84 PC-1600 or PC-2100 DDR DRAM....84 PCI (Peripheral Component Interface) Bus....85 PDF Format.....85 PnP (Plug and Play).....85 POST (Power-On Self Test)....85 RDRAM (Rambus DRAM).....86 RIMM (Rambus Inline Memory Module)....86 SDRAM (Synchronous DRAM)....86
Shadow E 2PROM......86 SIMM (Single In Line Memory Module)....87 SMBus (System Management Bus)....87 SPD (Serial Presence Detect).....87 Ultra DMA......88 USB (Universal Serial Bus).....88 VCM (Virtual Channel Memory).....89 ZIP file......89
Troubleshooting.....90 Technical Support....94 Product Registration....97 How to Contact Us....98

You Must Notice

Adobe, the Adobe logo, Acrobat is trademarks of Adobe Systems Incorporated. AMD, the AMD logo, Athlon and Duron are trademarks of Advanced Micro Devices, Inc. Intel, the Intel logo, Intel Celeron, Pentium II, Pentium III are trademarks of Intel Corporation. Microsoft, Windows, and Windows logo are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries. All product and brand names used on this manual are used for identification purposes only and may be the registered trademarks of their respective owners. All of the specifications and information contained in this manual are subject to change without notice. AOpen reserves the right to revise this publication and to make reasonable changes. AOpen assumes no responsibility for any errors or inaccuracies that may appear in this manual, including the products and software described in it.

Expansion Slots

Including five 32-bit/33MHz PCI, one CNR and one AGP Pro slots. The PCI local bus throughput can be up to 132MB/s. The Communication & Nectworking Riser (CNR) slot provided from AX4T II can support CNR interface for a LAN/Modem/Audio card. The Accelerated Graphics Port (AGP) specification provides a new level of video display sophistication and speed. The AGP video cards support data transfer rate up to 1066MB/s. As AX4T II motherboard includes one AGP Pro expansion slot for a bus mastering AGP graphic card, for AD and SBA signaling, AX4T II can support AGP 4X mode.

Memory

Provides four 168-pin DRDRAM DIMM socket that support up to 2GB of PC-600/800 compliant DRDRAM (Direct Rambus DRAM). You may install 64, 128, 256 or 512MB with ECC (Error Checking and Correction) RDRAM RIMM modules into each socket.
Ultra DMA 33/66/100 Bus Mater IDE
Comes with an on-board PCI Bus Master IDE controller with two connectors that supports four IDE devices in two channels, supports Ultra DMA 33/66/100, PIO Modes 3 and 4 and Bus Master IDE DMA Mode 4, and supports Enhanced IDE devices.

On-board AC97 Sound

AX4T II uses AC97 sound chip. This on-board audio includes a complete audio recording and playback system.

Four USB Connectors

AX4T II provides two ports, four USB connectors for USB interface devices such as mouse, keyboard, modem, scanner, etc.
Power Management/Plug and Play
AX4T II supports the power management function that confirms to the power-saving standards of the U.S. Environmental Protection Agency (EPA) Energy Star program. It also offers Plug-and-Play, which helps save users from configuration problems, thus making system user-friendlier.
Hardware Monitoring Management
Supports CPU or system fans status, temperature and voltage monitoring and alert, through the on-board hardware monitor module.

Enhanced ACPI

Fully implement the ACPI standard for Windows 98/ME/2000 series compatibility, and supports Soft-Off, STR (Suspend to RAM, S3), STD (Suspend to Disk, S4), WOM (Wake On Modem), WOL (Wake On LAN) features.

Super Multi-I/O

AX4T II provides two high-speed UART compatible serial ports and one parallel port with EPP and ECP capabilities. UART2 can also be directed from COM2 to the Infrared Module for the wireless connections.
Q ui c k I n s t a l l a t i o n P r o c e d ur e
This page gives you a quick procedure on how to install your system. Follow each step accordingly.

Clock Generator

BIOS Controlled
CPU Freq. Ratio CPU VID signal CPU voltage Power Regulator (Automatically generates CPU voltage)

Circuit

S e t t i n g C P U Fr e q u e n c y
This motherboard is CPU jumper-less design, you can set CPU frequency through the BIOS setup, and no jumpers or switches are needed.
BIOS Setup > Frequency/Voltage Control > CPU Clock Ratio

CPU Ratio CPU FSB

8x, 9x, 10x, 11x, , 22x, 23x 100-180MHz by 1MHz stepping

Warning:

Intel 850 chipset supports maximum
400MHz (100MHz*4) system bus and 66MHz AGP clock, higher clock setting may cause serious system damage.
Tip: If your system hangs or fails to boot because of overclocking, simply use <Home> key to restore the default setting.
S upport e d CP U Fre que nc y
Core Frequency = CPU Bus Clock * 4 * CPU Ratio PCI Clock = CPU Bus Clock / Clock Ratio AGP Clock = PCI Clock x 2
Note: This motherboard support CPU auto-detection function. Hence, you dont need to setup the CPU frequency by manual.
CPU Pentium 4 1.3G Pentium 4 1.4G Pentium 4 1.5G Pentium 4 1.6G Pentium 4 1.7G Pentium 4 1.8G Pentium 4 1.9G Pentium 4 2.0G Pentium 4 2.2G Pentium 4 2.3G
CPU Core Frequency 1.3GHz 1.4GHz 1.5GHz 1.6GHz 1.7GHz 1.8GHz 1.9GHz 2.0GHz 2.2GHz 2.3GHz
FSB Clock 100MHz 100MHz 100MHz 100MHz 100MHz 100MHz 100MHz 100MHz 100MHz 100MHz
Ratio 13x 14x 15x 16x 17x 18x 19x 20x 22x 23x
Intel 850 chipset supports maximum 400MHz (100MHz*4)
system bus and 66MHz AGP clock, higher clock setting may cause serious system damage.
C P U a n d H o u s i n g F a n C o n n e c t o r ( w i t h H/ W M o ni t o r i n g )
Plug in the CPU fan cable to the 3-pin CPU FAN connector. If you have chassis fan, you can also plug it on FAN2 or FAN3 (without H/W monitoring) connector.

CPU Fan Connector

GND +12V SENSOR
FAN3 Connector NC +12V Note: Some CPU fans do not have sensor pin, so that cannot support hardware monitoring function. GND

FAN2 Connector 25

H o w t o I ns t a l l CP U H e a t s i n k a n d F a n
This motherboard comes with a retention module attached on the CPU socket when shipped, we strongly recommend you to install AOpen special designed CPU Fan as shown below on the retention module for better heat dissipation. Please install the CPU Fan correctly as the following pictures shown. 1. Gently put the CPU Fan down on the retention module with clips aligning correctly to the four corners. 2. Pressing down the four clips with force one by one on the retention module.
Note: The picture above may look different from the product you purchased.

RI M M S o c k e t s

This motherboard has four 184-pin RIMM sockets that allow you to install PC600 and PC800 RDRAM up to 2GB. AX4T II will detect the RDRAM speed automatically while system is in POST, but it still allows you to select the RDRAM type manually by BIOS setup program. Note: Based on Intel 850 chipset specification, AX4T II has dual memory channel. Please note that when you insert RIMM modules, you have to insert them into RIMM 1 and 4, and have terminators inserted into RIMM 2 and 3. Or you can insert RIMM modules into RIMM 2 and 3, and have terminators inserted into RIMM 1 and 4

RIMM3 RIMM4

Pictures below are Direct RDRAM memory module and RIMM terminator (also called C-RIMM). Please do not forget to insert the RIMM terminator into the proper RIMM socket, otherwise the system cannot be booted.

DRDRAM RIMM Module

RIMM Terminator
H o w t o I ns t a l l Me m o r y M o d u l e s
Please follow the procedure as shown below to finish memory installation.
Make sure the RIMM modules pin face down and match the sockets size as depicted below.

60 pins 2.

88 pins
Insert the module straight down to the RIMM slot with both hands and press down firmly until the RIMM module is securely in place.
Note: The tabs of the RIMM slot Tab will close-up to hold the RIMM in place when the RIMM touches the slots bottom.
3. Repeat step 2 to finish additional RIMM & C-RIMM modules installation.

Direct RDRAM Module

C-RIMM Module
Note: Please do not forget to install the C-RIMM modules into the proper RIMM slots.
Note: Pictures shown here are for reference only.
Fr o n t P a n e l C o n n e c t o r
Attach the power LED, EMPI, speaker, power and reset switch connectors to the corresponding pins. If you enable Suspend Mode item in BIOS Setup, the ACPI & Power LED will keep flashing while the system is in suspend mode. Locate the power switch cable from your ATX housing. It is 2-pin female connector from the housing front panel. Plug this connector to the soft-power switch connector marked SPWR. Suspend Type Power on Suspend (S1) or Suspend to RAM (S3) Suspend to Disk (S4) ACPI LED Keep flashing The LED will be turned off

1 Power Switch

NC NC +5V IDE LED IDE LED +5V +5V GND NC SPEAKER SPWR GND ACPI & PWR LED GND +5V NC NC GND RESET GND

IDE LED

ACPI & Power LED

+ Speaker Reset

ATX Power Connector
This motherboard comes with a 20-pin and 4-pin ATX power connector as shown below. Make sure you plug in the right direction. We strongly recommend you to connect the 4-pin 12V ATX connector before connecting the 20-pin ATX power connector and use standard power supply specially designed for Pentium 4 system.

Power Connector

COM +5V COM +3.3V +3.3V +5V COM PW-OK 5VSB +12V

+3.3V -12V COM PS-ON COM

Warning: The specification of the IDE cable is a maximum of 46cm (18 inches); make sure your cable does not exceed this length. 35
JP 7 R a i d Se l e c t J u m p er (O p t i o n al )
This jumper allows you to select the Raid function by adjusting the position of its yellow cap.
JP7 Enable/Disable Raid Jumper

Other IDE

I r DA C o n n e c t o r
The IrDA connector can be configured to support wireless infrared module, with this module and application software such as Laplink or Windows 95 Direct Cable Connection, the user can transfer files to or from laptops, notebooks, PDA devices and printers. This connector supports HPSIR (115.2Kbps, 2 meters) and ASK-IR (56Kbps). Install the infrared module onto the IrDA connector and enable the infrared function from BIOS Setup, UART2 Mode, make sure to have the correct orientation when you plug in the IrDA connector.

IrDA Connector

1 NC +5V IR_TX KEY GND IR_RX
A G P ( A c c e l e r a t e d G r a p hi c P o r t ) P r o E x p a n s i o n S l o t
AX4T II provides an AGP Pro slot. The AGP Pro is a bus interface targeted for high-performance 3D graphic. Recently, there are more memory modules on the AGP card. Hence, the AGP card needs more power to drive these chips. The AGP Pro interface has more power pins to provide more power for the card. AGP supports only memory read/write operation and single-master single-slave one-to-one only. AGP Pro now supports AGP 4x mode, 66MHz x 4bytes x 4 = 1056MB/s. There is an external power connector called CN12 for AGP card. You can connect it with proper cable to get steady power for AGP Pro display card.

+12V GND GND VCC

AGP Pro Expansion Slot
C N R ( C o m m u ni c a t i o n a n d N e t w or k Ri s e r ) E x pa n s i o n S l o t
CNR is a riser card specification to replace the AMR (Audio/Modem Riser) that supports V.90 analog modem, multi-channel audio, and phone-line based networking. Owing to CPU computing power getting stronger, the digital processing job can be implemented in main chipset and share CPU power. The analogy conversion (CODEC) circuit requires a different and separate circuit design, which is put on CNR card. This motherboard implements sound CODEC on board (can be disabled by BIOS setup program), but reserve CNR slot for the option of modem function. Note that you can still use PCI modem card.

Note: This diagram is for example only, it may not be exactly the same as this motherboard.
Layout (Frequency Isolation Wall)
For high frequency operation, especially overclocking, layout is the most important factor to make sure chipset and CPU working in stable condition. The layout of this motherboard implements AOpens unique design called Frequency Isolation Wall. Separating each critical portion of motherboard into regions where each region operates in a same or similar frequency range to avoid cross talk and frequency interference between each regions operations and condition. The trace length and route must be calculated carefully. For example, the clock trace must be equal length (not necessarily as short as possible) so that clock skew will be controlled within few a pico second (1/1012 Sec)
Note: This diagram for example only, it may not be exactly the same as this motherboard.
P ur e Al u m i n u m H e a t s i n k
Cool down CPU and Chipset is important for system reliability. Aluminum heat sink provides better heat consumption especially when you are trying to overclock.
D ri v e r a n d U t i l i t y
There are motherboard drivers and utilities included in AOpen Bonus CD disc. You dont need to install all of them in order to boot your system. But after you finish the hardware installation, you have to install your operation system first (such as Windows 98) before you can install any drivers or utilities. Please refer to your operation systems installation guide.
Note: Please follow recommended procedure to install Windows 95 and Windows 98.
A u t o - r u n Me n u f r o m B o n u s C D Di s c
You can use the auto-run menu of Bonus CD disc. Choose the utility and driver and select model name.
Eliminate ? mark from Windows 95/98
Windows 95/98 cannot recognize this chipset, because it was released before the Intel 850 chipset. You can install the Intel INF Update Utility from the Bonus Pack CD disc auto-run menu to eliminate the ? marks.
I n s t a l l i n g I n t e l I A A Dr i v e r
You can install Intel IAA Driver to increase the performance of software applications and reduce PC boot times. You can find it in the AOpen Bonus Pack CD disc.
I n s t a l l i n g O n b o a r d L A N Dr i v e r ( O p t i o n a l )
This motherboard comes with an Intel 82562ET 10/100 LAN controller. You can find the LAN driver from the Bonus Pack CD disc. Please finish the onboard sound chip driver installation as following: 1. 2. 3. 4. 5. 6. Install operation system fully. After installation, go the Start menu and choose Setting. From the Setting menu, choose Control Panel. In the Control Panel window, double-click the System icon. In the System window, choose the Device Manager tab. In the hierarchical display under Other Devices is a listing for PCI Ethernet Controller. Choose it and then press Properties button. 7. 8. 9. Choose Driver tab in the Properties window, choose Update Driver, and then press Next. Choose Search for a better driver than the one your device id using now (recommended), and then press Next. Choose Specify Location, and then type full path of driver location in the text box. Or you can choose Browse button for specify drivers location.

10. Insert the AOpen Bonus Pack CD into the CD-ROM. 11. Press the Next button. A message informing you that system has found Intel (R) PRO/100 VE Network Connection should appear. 12. Press the Next, and then Finish, and then Yes when asked if you want to restart your computer.
I n s t a l l i n g O n b o a r d S o u n d Dr i v e r
This motherboard comes with an RealTek ALC201 chip. You can find the audio driver from the Bonus Pack CD disc auto-run menu.
I n s t a l l i n g H a r d w a r e M o n i t or i n g U t i l i t y
You can install Hardware Monitoring Utility to monitor CPU temperature, fans and system voltage. The hardware monitoring function is automatically implemented by the BIOS and utility software. No hardware installation is needed. To install the software, double click Setup.exe. The driver will be copied into Windows directory and an entry of Hardware Monitor in the start menu will be created.
A C P I S u s p e n d t o H a r d Dr i v e
ACPI Suspend to Hard Drive is basically controlled by Windows operation system. It saves your current work (system status, memory and screen image) into hard disk, and then the system can be totally power off. Next time, when power is on, you can resume your original work directly from hard disk within few seconds without go through the Windows booting process and run your application again. If your memory is 64MB, normally, you need to reserve at least 64MB HDD space to save your memory image.
When go into Suspend: System Image & Status

Save into

Hard Disk
When power-on next time: System Image & Status

Restore within seconds

System Requirement
1. 2. AOZVHDD.EXE 1.30b or later. Delete config.sys and autoexec.bat.
Fresh installation of Windows 98 on a new system
1. Execute "Setup.exe /p j" to install Windows 98 2. After Windows 98's installation is complete, go to the Control Panel > Power Management. a. Set Power Schemes > System Standby to "Never". b. Click on "Hibernate" and select "Enable Hibernate Support" then "Apply". c. Click on the "Advanced" tab, you'll see "Hibernate" on "Power Buttons". Note that this option will only be seen after step b mentioned above has been completed; otherwise only "Standby" and "Shutdown" will be shown. Select "Hibernate" and "Apply". 3. Clean boot into DOS and run AOZVHDD utility. a. If you assign the whole disk to your Win 98 system (FAT 16 or FAT 32), please run "aozvhdd /c /file". Please remember sufficient free space has to be reserved in the disk, e.g. if you have 64 MB DRAM and 16 MB VGA card installed, the system needs at least 80 MB free space. The utility will locate the space automatically. b. If you assign an individual partition for Win 98, please run "aozvhdd /c /partition". Of course, the system needs to provide unformatted an empty partition. 4. Reboot system. 5. You've already implemented ACPI Suspend to-Hard Drive. Click "Start > Shut Down > Standby" then the screen will go off immediately. And 1 minute or so will be taken for the system to save what's in the memory to the hard drive; the larger the memory size the longer this process will take.

O v e r cl o c k i n g

As a leading manufacturer in motherboard industry, AOpen always listens to what customers want and develop products to fit different user's requirements. Reliability, compatibility, leading technology and friendly features are our basic goals when designing motherboards. Other than above mentioned design criteria, there are power users who are always seeking to push the limitation of the system performance by overclocking which we call them "Overclocker". This section is dedicated to overclockers. This high performance motherboard is designed for maximum 100MHz (System bus = 400MHz) CPU bus clock. But it comes with clock generator of 180MHz when we design it to accommodate future CPU bus clock. Our lab test results shown that 115MHz is achievable when proper setting and qualified components were presented, we feel quite comfortable overclocking to 115MHz. Not only that, this motherboard has full-range (CPU core voltage) settings. For your reference, the configuration that we feel comfortable is at 115MHz bus clock.

But not guaranty.

Tip: Note that overclocking may also cause thermal problem. Please make sure that the cooling fan and the heatsink were adequate to dissipate excessive heat that's generated by overclocking the CPU.
Warning: The design of this product follows CPU and chipset vendor's design guideline. Any attempts to push beyond product specification are not recommended and you are taking your own risk to damage your system or important data. Before doing overclocking, you must make sure your components are able to tolerate such abnormal setting, especially CPU, DRAMs, hard disks, and AGP VGA cards.
VG A C ar d & H ar d D i s k
VGA and HDD is key components for overclocking, for your reference, the following list are what have been successful overclocked in our lab. Please note that AOpen can not guaranty they can be successful overclocked again. Please check the Available Vendor List (AVL) by link to our official website. VGA: http://www.aopen.com.tw/tech/report/overclk/mb/vga-oc.htm HDD: http://www.aopen.com.tw/tech/report/overclk/mb/hdd-oc.htm

ATA/100

ATA/100 is a new IDE specification under developing. ATA/100 uses both rising edge and falling edge as ATA/66 but clock cycle time is reduced to 40ns. The data transfer rate is (1/40ns) x 2 bytes x 2 = 100MB/s. To use ATA/100, you need special 80-wire IDE cable, the same as ATA/66.
B I O S ( Ba s i c I n p u t / O u t p u t S y s t e m )
BIOS is a set of assembly routine/program that reside in EPROM or Flash ROM. BIOS controls Input/output devices and other hardware devices of motherboard. In general, to provide hardware independent portability, operation system and drivers is required to access BIOS without directly access hardware devices.
B us M a s t e r I D E ( D M A m o de )
The traditional PIO (Programmable I/O) IDE requires the CPU to involve in all the activities of the IDE access including waiting for the mechanical events. To reduce the workload of the CPU, the bus master IDE device transfers data from/to memory without interrupting CPU, and releases CPU to operate concurrently while data is transferring between memory and IDE device. You need the bus master IDE driver and the bus master IDE HDD to support bus master IDE mode.
C N R ( C o m m un i c a t i o n a n d Ne t w o r k i n g R i s e r )
The CNR specification provides the PC industry the opportunity to deliver a flexible and cost reduced method of implementing LAN, home networking, DSL, USB, wireless, audio and modem subsystems widely used in today's "connected PCs". The CNR specification is an open industry specification and is supported by OEMs, IHV card manufacturers, silicon supplier and Microsoft.
C O DE C ( C o d i n g a n d De c o di n g )
Normally, CODEC means a circuit that can do digital to analog conversion and also the analog to digital conversion. It is part of AC97 sound/modem solution.
D D R ( D o u b l e Da t a R a te d ) S D R A M
DDR SDRAM utilizes the existing DRAM infrastructure and technology while doubling the nominal bandwidth available to systems in an easy to design and simple to adopt way. Initially a perfect solution for memory intensive server and workstation applications, DDR low cost and low voltage will ultimately make it an ideal solution for all segments of the PC market, high performance desktop and mobile PCs, Value PCs and even Internet Appliances and mobile devices.
D I M M ( D ua l I n L i ne M e m o r y M o d u l e )
DIMM socket has total 168-pin and supports 64-bit data. It can be single or double side, the golden finger signals on each side of PCB are different, and that is why it was called Dual In Line. Almost all DIMMs are made by SDRAM, which operate at 3.3V. Note that some old DIMMs are made by FPM/EDO and only operate at 5V. Do not confuse them with SDRAM DIMM.

F S B ( F r o n t S i d e B u s ) C l oc k
FSB Clock means CPU external bus clock. CPU internal clock = CPU FSB Clock x CPU Clock Ratio

I2C Bus

See SMBus.

IE EE 4

IEEE 1394 is a low-cost digital interface originated by Apple Computer as a desktop LAN and developed by the IEEE 1394 working group. The IEEE 1394 can transport data at 100, 200 or 400 Mbps. One of the solutions to connect digital television devices together at 200 Mbps. Serial Bus Management provides overall configuration control of the serial bus in the form of optimizing arbitration timing, guarantee of adequate electrical power for all devices on the bus, assignment of isochronous channel ID, and notification of errors. There are two type of IEEE 1394 data transfer: asynchronous and isochronous. Asynchronous transport is the traditional computer memory-mapped, load and store interface. Data requests are sent to a specific address and an acknowledgment is returned. In addition to an architecture that scales with silicon technology, IEEE 1394 features a unique isochronous data channel interface. Isochronous data channels provide guaranteed data transport at a pre-determined rate. This is especially important for time-critical multimedia data where just-in-time delivery eliminates the need for costly buffering.

P a r i t y Bi t

The parity mode uses 1 parity bit for each byte, normally it is even parity mode, that is, each time the memory data is updated, parity bit will be adjusted to have even count "1" for each byte. When next time, if memory is read with odd number of "1", the parity error is occurred and this is called single bit error detection.
P BS R A M ( P i p e l i n e d B u r s t S R A M )
For Socket 7 CPU, one burst data read requires four QWord (Quad-word, 4x16 = 64 bits). PBSRAM only needs one address decoding time and automatically sends the remaining QWords to CPU according to a predefined sequence. Normally, it is 3-1-1-1, total 6 clocks, which is faster than asynchronous SRAM. PBSRAM is often used on L2 (level 2) cache of Socket 7 CPU. Slot 1 and Socket 370 CPU do not need PBSRAM.

P C -0 D I M M

SDRAM DIMM that supports 100MHz CPU FSB bus clock.

P C -3 D I M M

SDRAM DIMM that supports 133MHz CPU FSB bus clock.
P C -o r P C - D D R D R A M
Based on FSB frequency, the DDR DRAM has 200MHz and 266MHz two type of working frequency. Because of DDR DRAM data bus is 64-bit, it provides data transfer bandwidth up to 200x64/8=1600MB/s, and 266x64/8=2100MB/s. Hence, the PC-1600 DDR DRAM is working with 100MHz and PC-2100 DDR DRAM is working with 133MHz FSB frequency.
P CI ( P e r i ph e r a l C o m p o ne n t I n te r f a c e ) B u s

Z IP f i le

A compressed file format to reduce file size. To unzip file, run shareware PKUNZIP (http://www.pkware.com/) for DOS and other operating system or WINZIP (http://www.winzip.com/) for windows environment.
T r ou b l e s h o o t i n g
If you encounter any trouble to boot you system, follow the procedures accordingly to resolve the problem.
Turn off the power and unplug the AC power cable, then remove all of the add-on cards and cables, including VGA, IDE, FDD, COM1, COM2 and i t
Make sure if all jumper settings are correct.

Clear CMOS

Continue
Install the VGA card. Then connect your monitor and keyboard.
Turn on the power Yes and check if the power supply and CPU fan work properly. No
The problem is probably caused by Next power supply or motherboard failure. Please contact your reseller or local distributor for repairing.
No Check if there is display? Yes Press <Ctrl> and <Alt> key at the same time, hold them and then press <Del> to reboot the system.
Perhaps your VGA card or monitor is defective.
No Check if the system reboots? Yes Next
It is very possible that your keyboard is defective.
During system rebooting, press <Del> to enter BIOS setup. Choose Load Setup Default.
Turn off the system and re-connect IDE cable.
Check if the system can reboot successfully? Yes
The problem should be caused by the IDE cable or HDD itself.
Re-install the operating system such as Windows 98.
T e ch n ic a l Su p p o r t
Dear Customer, Thanks for choosing AOpen products. To provide the best and fastest service to our customer is our first priority. However, we receive numerous emails and phone-calls worldwide everyday, it is very hard for us to serve everyone on time. We recommend you follow the procedures below and seek help before contact us. With your help, we can then continue to provide the best quality service to more customers. Thanks very much for your understanding! AOpen Technical Supporting Team
Online Manual: Please check the manual carefully and make sure the jumper settings and installation procedure are correct. http://www.aopen.com.tw/tech/download/manual/default.htm Test Report: We recommend choosing board/card/device from the compatibility test reports for assembling your PC. http://www.aopen.com.tw/tech/report/default.htm
FAQ: The latest FAQ (Frequently Asked Questions) may contain a solution to your problem. http://www.aopen.com.tw/tech/faq/default.htm

Download Software: Check out this table to get the latest updated BIOS/utility and drivers. http://www.aopen.com.tw/tech/download/default.htm 94
News Group: Your problem probably had been answered by our support engineer or professional users on the news group. http://www.aopen.com.tw/tech/newsgrp/default.htm Contact Distributors/Resellers: We sell our products through resellers and integrators. They should know your system configuration very well and should be able to solve your problem more efficiently than us. After all, their attitude of service is an important reference for you if next time you want to buy something else from them. Contact Us: Please prepare detail system configuration and error symptom before contacting us. The part number, serial number and BIOS version are also very helpful.
Part Nu m b er an d Seri al Nu m b er
The Part Number and Serial number are printed on bar code label. You can find this bar code label on the outside packing, on ISA/CPU slot or on component side of PCB. For example:

Part No.

Serial No.
P/N: 91.88110.201 is part number, S/N: 91949378KN73 is serial number.
Mo d e l n a m e a n d B I O S v e r s i o n
Model name and BIOS version can be found on upper left corner of first boot screen (POST screen). For example:
AX4T II R1.00 Oct. 15. 2000 AOpen Inc.
Award Plug and Play BIOS Extension v1.0A Copyright 1998, Award Software, Inc.
AX4T II is model name of motherboard, R1.00 is BIOS version.

Produ c t R egis tration

Thank you for choosing AOpen product. AOpen encourages you to spend few minutes in completing the following product registration. To register your product will ensure the high quality of services from AOpen. After the registration, you will:
Have opportunities to play online slot machine and win a prize from AOpen by accumulating your bonuses for later prize

exchange.

Be upgraded to gold membership of Club AOpen program. Receive email notification about product safety alerts. Its purpose is to alert consumers quickly and conveniently when products contain technical issues. Receive email notification about latest product's announcements. Be able to personalize your AOpen web pages. Receive e-mail notification about latest BIOS/Driver/Software release information. Have opportunities to participate special product promotional programs. Enjoy higher service priority to receive technical assistance provided by AOpen specialists worldwide. Be able to join the discussions of web-based news groups.

AOpen makes sure that the information you provide is encrypted, so that it cannot be read or intercepted by other people or companies. Further, AOpen will not disclose any of information you submitted under any conditions. Please consult our online privacy policy for further information on our company policy.
Note: If registering products purchased from different dealers/retails and/or purchased on different dates, please submit a separate form for each product. 97
H o w t o C o n t ac t U s
Please do not hesitate contact us if you have any problem about our products. Any opinion will be appreciated. Pacific Rim AOpen Inc. Tel: 886-2-2696-1333 Fax: 886-2-8691-2233 Europe AOpen Computer b.v. Tel: 31-73-645-9516 Fax: 31-73-645-9604 America AOpen America Inc. Tel: 1-510-498-8928 Fax: 1-408-922-2935, 1-408-432-0496

Germany

AOpen Computer GmbH. Tel: 49-2102-157700 Fax: 49-2102-157799
Tel: 49-2102-157700 Fax: 49-2102-157799
Web Site: http://www.aopen.com.tw E-mail: Send us email by going through the contact form below. English Japanese Chinese German French http://www.aopen.com.tw/tech/contact/techusa.htm http://aojp.aopen.com.tw/tech/contact/techjp.htm http://w3.aopen.com.tw/tech/contact/techtw.htm http://www.aopencom.de/tech/contact/techde.htm http://aofr.aopen.com.tw/tech/contact/techfr.htm
Simplified Chinese http://www.aopen.com.cn/tech/contact/techcn.htm 98