AOpen AX64 Installation Manual page 3

Installing CPU and Fan
Plug CPU to slot1 connector. Be careful of CPU
orientation. Plug in the fan cable to the 3-pin
CPUFAN or FAN connector.
Auto-Detect CPU Core Voltage
This motherboard supports Pentium II / Pentium III CPU VID function. The CPU
core voltage will be automatically detected and the range is from 1.3V to 3.5V.
Setting CPU Frequency
The CPU frequency selection is set by going into:
BIOS Setup > Chipset Features Setup > CPU Voltage Setting
CPU Ratio 1.5x, 2x, 2.5x, 3x, 3.5x, 4x, 4.5x, 5x, 5.5x, 6x, 6.5x, 7x, 7.5x, and 8x
66.8, 75, 83.3, 100, 103, 105, 110, 112, 115, 120, 124, 133, 140, and
CPU FSB
150 MHz
Core Frequency = CPU FSB Clock * CPU Ratio
CPU Type FSB Clock
CELERON 300A 66MHZ
CELERON 433 66MHZ
Pentium II 350 100MHZ
Pentium II 400 100MHZ
Pentium II 450 100MHZ
Pentium!!! 450 100MHZ
Pentium!!! 500 100MHZ
Pentium!!! 550 100MHZ
Pentium!!! 600 100MHZ
Pentium!!! 533 133MHZ
Pentium!!! 600 133MHZ
Pentium!!! 600E 100MHZ
Pentium!!! 600EB 133MHZ
Pentium!!! 650E 100MHZ
Pentium!!! 667EB 133MHZ
Pentium!!! 700E 100MHZ
Pentium!!! 733EB 133MHZ
Pentium!!! 750E 100MHZ
Pentium!!! 800E 100MHZ
Pentium!!! 800EB 133MHZ
GND
+12V
SENSOR
Note: Some CPU fans do not
have sensor pin, so that cannot
support fan monitoring.
Ratio
4.5x
6.5x
3.5x
4x
4.5x
4.5x
5x
5.5x
6x
4x
4.5x
6x
4.5x
6.5x
5x
7x
5.5x
7.5x
8x
6x
JP23/JP29 HOST/PCI Clock Ratio
This jumper is used to specify the relationship of PCI and
host clock. Generally speaking, we suggest you do not
change the default setting. But for overclocking, changing
these jumper settings becomes necessary. For example,
you must set JP29 to "5-6" and JP23 to "3-4" if you want to
overclock a 66MHz FSB clock CPU to 100MHz or higher.
JP23 JP29 JP23 JP29
1 2
1 2 1 2 1 2
5 6
5 6 5 6 5 6
Auto 4X
(default) (133~150MHz)
Clock Ratio CPU (Host) PCI
2X 66 33
3X 100 33
3X, overclocking 112 37.3
4X 133 33
4X, overclocking 150 37.5
Warning: VIA 694x chipset supports maximum 133MHz FSB and
66MHz AGP clock, higher clock setting may cause serious system
damage.
Tip: If your system hangs or fails to boot
Home
because of overclocking, simply use
<Home> key to restore the default setting
(233MHz).
JP23 JP29 JP23 JP29
1 2 1 2 1 2 1 2
5 6 5 6 5 6
5 6
3X 2X
(100~124MHz) (66~83MHz)
AGP Memory
66 PCI x2 or x3
66 PCI x2 or x3 or x4
74.6 PCI x2 or x3 or x4
66 PCI x3 or x4
75 PCI x3 or x4