AOpen AX4SGUL User Manual

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AOpen i865 Family Motherboards

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AOpen “Watch Dog ABS”

AOpen provides a special and useful feature on this motherboard for overclockers. When you power-onthe system, the BIOS will check last systemPOST status. If it succeeded, the BIOS will enable “Watch Dog ABS” function immediately, and set the CPU FSB frequency according

to user’s settings stored in the BIOS. If system failed in BIOS POST, the “Watch Dog Timer” will reset the system to reboot in five seconds. Then, BIOS will detect the CPU’s default frequency and POST again. With this special feature, you can easily overclock your system to get a higher system performance without removing the system housing and save the hassle from setting the jumper to clear CMOS data when system hangs.

Enable/Disable Signal from

BIOS

BIOS

Reset Signal

AOpen

Watch Dog ABS

Clock Generator

CPU ID Signal

Countdown about 5 seconds if fails in POST

CPU

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Full-rangeAdjustable CPU Core Voltage

This motherboard supports CPU VID function. The CPU core voltage will be automatically detected and the range is from 0.8375V to 1.6000V. It is not necessary to set CPU Core Voltage.

Setting CPU Frequency

BIOS Setup > Frequency/Voltage Control > CPU Bus Frequency

This motherboard is CPU jumper-lessdesign, you can set CPU frequency in BIOS; no jumpers or switches are needed. The default setting is "table select mode". You can adjust the FSB from "CPU Host/RAM/PCI Clock" for overclocking.

Core Frequency = CPU FSB Clock * CPU Ratio

PCI Clock = CPU FSB Clock / Clock Ratio

AGP Clock = PCI Clock x 2

CPU Ratio

8x, 10x… 25x, 26x, 27x, 28x

CPU FSB (By BIOS table)

100-400MHz

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AOpen i865 Family Motherboards

 

 

Northwood CPU

 

 

CPU Core

 

 

FSB

 

 

System

 

 

Ratio

 

 

 

 

 

 

Frequency

 

 

Clock

 

 

Bus

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pentium 4

1.7G

 

 

1700MHz

 

 

133MHz

 

 

533MHz

 

 

13x

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pentium 4

1.8G

 

 

1800MHz

 

 

100MHz

 

 

400MHz

 

 

18x

 

 

 

 

Pentium 4

2.0G

 

 

2000MHz

 

 

100MHz

 

 

400MHz

 

 

20x

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pentium 4

2.2G

 

 

2200MHz

 

 

100MHz

 

 

400MHz

 

 

22x

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pentium 4

2.2G

 

 

2200MHz

 

 

133MHz

 

 

533MHz

 

 

16x

 

 

 

 

Pentium 4

2.26G

 

 

2260MHz

 

 

133MHz

 

 

533MHz

 

 

17x

 

 

 

 

Pentium 4

2.4G

 

 

2400MHz

 

 

100MHz

 

 

400MHz

 

 

24x

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pentium 4

2.4G

 

 

2400MHz

 

 

133MHz

 

 

533MHz

 

 

18x

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pentium 4

2.53G

 

 

2530MHz

 

 

133MHz

 

 

533MHz

 

 

19x

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pentium 4

2.6G

 

 

2600MHz

 

 

200MHz

 

 

800MHz

 

 

13x

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pentium 4

2.66G

 

 

2660MHz

 

 

133MHz

 

 

533MHz

 

 

20x

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pentium 4

2.8G

 

 

2800MHz

 

 

133MHz

 

 

533MHz

 

 

21x

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pentium 4

2.8G

 

 

2800MHz

 

 

200MHz

 

 

800MHz

 

 

14x

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pentium 4

3.06G

 

 

3066MHz

 

 

133MHz

 

 

533MHz

 

 

23x

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pentium 4

3.20G

 

 

3200MHz

 

 

200MHz

 

 

800MHz

 

 

16x

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note: With CPU speed changing rapidly, there might be fastest CPU on the market by the time you received this installation guide. This table is kindly for your references only.

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Note: Intel 865G/PE and 848P chipset only support Northwood processors. Northwood processors would detect the clock ratio automatically; you may not be able to adjust the clock ratio in BIOS manually.

Warning: Intel 865G/PE and 848P chipset supports maximum 800MHz (200MHz*4) system bus and 66MHz AGP clock; higher clock setting may cause serious system damage.

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CPU and System Fan Connector (with H/W Moonniittoorriinngg))

The fan Connectors are painted in white in EzColor. Please plug in the CPU fan cable to the 3-pinCPUFAN connector. If you have chassis fan, you can also plug it onSYSFAN1 orSYSFAN2 connector.

SENSOR +12VGND

SYSFAN2 Connector

GND

+12V

SENSOR

SYSFAN1 Connector

GND +12V SENSOR

CPUFAN Connector

Note: Some CPU fans do not have sensor pin, so that they cannot support hardware monitoring function.

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AOpen i865 Family Motherboards

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JP28 Keyboard/Mouse Wake-upJumper

This motherboard provides PS2 keyboard / mouse wake-upfunction. You can use JP28 to enable or disable this function, which could resume your system from suspend mode with keyboard or mouse. The factory default setting is set to “Disable”(1-2),and you may enable this function by setting the jumper to2-3.

Pin 1

1

 

1

 

 

 

 

 

 

 

 

 

 

 

 

Disable

Enable

(Default)

 

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DIMM Sockets

For AX4SG and AX4SPE series, the motherboard has four 184-pinDDR DIMM sockets that allow you to install128-bitdual channelDDR400,DDR333 orDDR266 memory up to 4GB. For AX4SPB series motherboard, it only has two DDR DIMM sockets and support maximum up to 2GB in Single Channel mode. The DIMM sockets are painted in electric blue and only supportnon-ECCDDR RAM. Please install suitable modules; otherwise serious damage may occur on memory sockets or you RAM modules. The RAM voltage for you to adjust is from2.60V-2.70V.

DIMMA1

DIMMA2

DIMMB1

DIMMB2

Warning: This motherboard supports DDR SDRAM. Please do not install the SDRAM on the DDR SDRAM sockets; otherwise it will cause serious damage on memory sockets or SDRAM module.

Note: To run dual channel speed, you have to use the same type memory modules installed on two DIMMs. If you install two different sized modules, the system can only run single channel mode and with the speed of that lower memory module.

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AOpen i865 Family Motherboards

How to Install Memory Modules

Please follow the procedure as shown below to finish memory installation.

1.Make sure the DIMM module’s pin face down and match the socket’s size as depicted below.

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Note: Please pay attention to the Blue slots. To run dual channel speed, you should insert the RAM in the slot of DIMM A1 and DIMM B1 or DIMM A2 and DIMM B2.

Please don't use the different frequency DIMM on dual channel

40 pins

52 pins

2. Insert the module straight down to the DIMM slot with both hands and press down firmly until the DIMM module is securely in

place.

 

 

Note: The tabs of the DIMM slot

 

will close-upto hold the DIMM in

 

place when the DIMM touches the

Tab

slot’s bottom.

Key

Pin 1

3.Repeat step 2 to finish additional DIMM modules installation.

Note: These images are for example only; they may not be exactly the same as the motherboard you purchased.

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AOpen i865 Family Motherboards

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ATX Power Connector

This motherboard comes with a 20-pinand4-pinATX power connector in flame red. Make sure you plug in the right direction. We strongly recommend you to connect the4-pin12V ATX connector before connecting the20-pinATX power connector and use standard power supply specially designed for Pentium 4 system.

+12V

+12V

Ground

Ground

AC Power Auto Recovery

A traditional ATX system should remain at power off stage when AC power resumes from power failure. This design is inconvenient for a network server or workstation, without an UPS, that needs to keep power-on.This motherboard implements an AC Power Auto Recovery function to solve this problem.

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AOpen i865 Family Motherboards

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IDE and Floppy Connector

Connect 34-pinfloppy cable and40-pinIDE cable to floppy connector FDD and IDE connector. The IDE 1 connector is painted in navy blue; the IDE 2 connector and FDD connector are painted in Black. Be careful of the pin1 orientation. Wrong orientation may cause system damage.

Pin1

 

 

Primary

 

Primary

 

FDD Connector

 

 

 

 

 

Master (1st)

 

Slave (2nd)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Secondary

 

Secondary

 

 

 

 

 

 

 

Master (3rd)

 

Slave (4th)

ATA 33/66/100

IDE 1 (Primary)

 

IDE 2 (Secondary)

 

 

 

 

 

 

 

 

IDE Connector

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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AOpen i865 Family Motherboards

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IDE1 is also known as the primary channel and IDE2 as the secondary channel. Each channel supports two IDE devices that make a total of four devices. In order to work together, the two devices on each channel must be set differently to Master andSlave mode. Either one can be the hard disk or the CDROM. The setting as master or slave mode depends on the jumper on your IDE device, so please refer to your hard disk and CDROM manual accordingly.

Tip:

1.For better signal quality, it is recommended to set the far end side device to master mode and follow the suggested sequence to install your new device. Please refer to above diagram

2.To achieve the best performance of Ultra DMA 66/100 hard disks, a special 80-wires IDE cable for Ultra DMA 66/100 is required.

Warning: The specification of the IDE cable is a maximum of 46cm (18 inches); make sure your cable does not exceed this length.

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