AOpen AX6BP-HW User Manual
Chapter 2
Hardware Installation
This chapter gives you a step-by-step procedure on how to install your system.
Follow each section accordingly.
Caution: Electrostatic discharge (ESD) can
damage your processor, disk drives, expansion
boards, and other components. Always
observe the following precautions before you
install a system component.
1. Do not remove a component from its
protective packaging until you are ready
to install it.
2. Wear a wrist ground strap and attach it to
a metal part of the system unit before
handling a component. If a wrist strap is
not available, maintain contact with the
system unit throughout any procedure
requiring ESD protection.
2-1
Hardware Installation
1
2
3
LED
IrDA
JP14
FAN
CPU FAN
PWR2
WKUP
COM1
PRINTER
COM2
JP23
SCSI
Wide-SCSI
2.1 Jumper and Connector Locations
The following figure shows the locations of the jumpers and connectors on the
system board:
I
S
A
HDD
PANEL
I
S
A
SPWR
LAN Wakeup
BIOS
I
S
A
P
P
C
C
I
I
3
4
SB-Link
R
A
I
D
P
O
R
T
P
P
C
C
I
I
1
2
FDC
A
G
P
CPU SLOT 1
IDE2
IDE1
USB
DIMM4
DIMM3
DIMM2
DIMM1
PS/2
KB
2-2
Hardware Installation
Jumpers:
JP14: Clear CMOS
JP23: AGP Ratio
Connectors:
PS2: PS/2 mouse connector
KB: PS/2 keyboard connector
COM1: COM1 connector
COM2: COM2 connector
PRINTER: Printer connector
PWR2: ATX power connector
USB: USB connector
FDC: Floppy drive connector
IDE1: IDE1 primary channel
IDE2: IDE2 secondary channel
CPUFAN: CPU Fan connector
FAN: Housing Fan Connector
IrDA: IrDA (Infrared) connector
HDD LED: HDD LED connector
PANEL: Front panel (Multifunction) connector
SPWR: ATX Soft-Power Switch Connector
MODEM-WKUP: Modem Wake Up Connector
LAN-WKUP: LAN Wake Up Connector
SB-LINK: Creative PCI sound card connector
2-3
Hardware Installation
2.2 Jumpers
With the help of Pentium II VID signal and SMbus, this motherboard is jumperless design.
2.2.1 Selecting the CPU Frequency
Pentium II VID signal and SMbus clock generator provide CPU voltage autodetection and allow user to set CPU frequency through CMOS setup, no jumper
or switch is needed. The correct CPU information is saved into EEPROM, with
these technologies, the disadvantages of Pentium base jumper-less design are
eliminated. There will be no worry of wrong CPU voltage detection and no need
to re-open the housing if CMOS battery loss.
The CPU frequency selection is set by going into:
BOIS Setup à Chipset Features Setup à CPU Clock Frequency
(The possible setting is 66, 68.5, 75, 83.3, 100, 103, 112 and 133.3 MHz)
BOIS Setup à Chipset Features Setup à CPU Clock Ratio
(The possible setting is 1.5x, 2x, 2.5x, 3x, 3.5x, 4x, 4.5x, 5x, 5.5x, 6x, 6.5x, 7x,
7.5x, and 8x)
Core frequency = Ratio * External bus clock
INTEL Pentium II CPU Core Frequency Ratio External Bus Clock
Pentium II - 233 233MHz = 3.5x 66MHz
Pentium II - 266 266MHz = 4x 66MHz
Pentium II - 300 300MHz = 4.5x 66MHz
Pentium II - 333 333MHz = 5x 66MHz
Pentium II - 350 350MHz= 3.5x 100MHz
Pentium II - 400 400MHz= 4x 100MHz
Pentium II - 450 450MHz= 4.5x 100MHz
Celeron 266 266MHz= 4x 66MHz
Celeron 300 300MHz 4.5x 66MHz
Celeron 300A 300MHz 4.5x 66MHz
Celeron 333 333MHz 5x 66MHz
2-4
Hardware Installation
3
3
Warning: INTEL 440BX chipset supports maximum 100MHz
external CPU bus clock, the 103, 112 and 133.3MHz are for
internal test only. These settings exceed the specification
of BX chipset, which may cause serious system damage.
2.2.2 Setting the CPU Voltage
This motherboard supports Pentium II VID function, the CPU core voltage is
automatically detected, the range is from 1.3V to 3.5V.
2.2.3 Clearing the CMOS
JP14
1-2
2-3
Clear CMOS
Normal operation
(default)
Clear CMOS
You need to clear the CMOS if you forget your
system password. To clear the CMOS, follow
the procedures listed below:
JP14
1
2
Normal Operation
JP14
1
2
Clear CMOS
(default)
The procedure to clear CMOS:
1. Turn off the system and unplug the AC power.
2. Remove ATX power cable from connector PWR2.
3. Locate JP14 and short pins 2-3 for a few seconds.
4. Return JP14 to its normal setting by shorting pins 1-2.
5. Connect ATX power cable back to connector PWR2.
6. Turn on the system power.
7. Press during bootup to enter the BIOS Setup Utility and specify a
new password, if needed.
Tip: If your system hangs or fails to boot because of
over-clocking, please clear CMOS and the system will go
back to default setting (233MHz).
2-5
Hardware Installation
Tip: Except using JP14, you may also press <Home>
key. By this smart design, it would be more convenient to
clear CMOS. For using this function, you just need to
press <Home> key first and then press Power button at
the same time. After doing this, the system will return to
the default setting (233MHz).
2-6
2.2.4 AGP Ratio
5
6
5
6
5
6
Hardware Installation
JP23
1-2
3-4
5-6
AGP Ratio
Auto (default)
2/3
1/1
To improve system performance, AX6B has
implemented this jumper for AGP to synchronize the
CPU 100Mhz (or above) external frequency. We
recommend you choose a better AGP card for
overclocking. Some AGP cards can not take 100MHz
bus frequency and may cause overclocking failure.
JP23
1
3
JP23
2
4
1
3
JP23
2
4
1
2
3
4
Auto
2/3
1/1
(Default)
There is a "66/100" signal pin from CPU for BX chipset to automatically identify
AGP clock, this is important for jumperless design. When a 66MHz Pentium II
CPU is used, the north bridge will synchronize the CPU external frequency and
the AGP bus frequency. Therefore, when you set the CPU external frequency to
100MHz, the AGP bus will also runs at 100MHz.
With 100MHz Pentium II CPU, the north bridge automatically set AGP frequency
to 2/3 AGP frequency. In other words, the AGP card will still runs at 66MHz while
the CPU is running at 100MHz external frequency.
Except Auto setting, you may also set this jumper to 2/3 or 1/1. Below is a table
for better understanding:
CPU Type 66/100 signal Bus clock AGP clock JP23
66MHz Low 66MHz 66MHz 1-2
66MHz Low 100MHz 100MHz 1-2
66MHz Low 100MHz 66MHz 3-4
100MHz High 100MHz 66MHz 1-2
100MHz High 100MHz 66MHz 3-4
100MHz High 100MHz 100MHz 5-6
100MHz High 133MHz 88.6MHz 1-2
100MHz High 133MHz 88.6MHz 3-4
100MHz High 133MHz 133MHz 5-6
Warning: The specification of AGP is maximum 66Mhz
clock. If the bus clock is larger than 66MHz, setting this
item to Enabled may cause serious system damage.
2-7
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