AOpen AX3S Easy Installation Manual page 3

Installing CPU and Fan
SENSOR
+12V
GND
Auto-Dectect CPU Core Voltage
This motherboard supports Celeron / 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 > Frequency / Voltage Control > CPU Speed Setup
CPU Ratio x2, x2.5, x 3, x 3.5, x 4, x 4.5, x 5, x 5.5, x 6, x 6.5, x 7, x 7.5, and x8
66.6, 66.8, 68.3, 75.3, 78, 80, 95, 100, 100.2, 105, 110, 114, 117, 122, 127, 129,
CPU FSB
133.3, 133.6, 138, 140, 144, 146.6, 150, 157.3, 160 and 166 MHz
Core Frequency = CPU FSB Clock * CPU Ratio
CPU CPU Core Frequency
CELERON 300A 300MHz =
CELERON 333 333MHz=
CELERON 366 366MHz=
CELERON 400 400MHz=
CELERON 433 433MHz=
CELERON 466 466MHz =
CELERON 500 500MHz =
CELERON 533 533MHz =
Pentium!!! 500E 500MHz=
Pentium!!! 550E 550MHz=
Pentium!!! 600E 600MHz=
Pentium!!! 667EB 667MHz=
Pentium!!! 700E 700MHz =
Pentium!!! 733EB 733MHz =
Pentium!!! 866EB 866MHz =
Plug CPU to Socket370. Be careful of CPU
orientation. Plug in the fan cable to the 3-pin
CPUFAN or FAN 1 connector.
Note: Some CPU fans do not
have sensor pin, so that cannot
support fan monitoring.
FSB Clock Ratio
66MHz 4.5x
66MHz 5x
66MHz 5.5x
66MHz 6x
66MHz 6.5x
66MHz 7x
66MHz 7.5x
66MHz 8x
100MHZ 5x
100MHZ 5.5x
100MHZ 6x
133MHZ 5x
100MHZ 7x
133MHZ 5.5x
133MHZ 6.5x
JP23/JP29 FSB/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
4X
Auto
(133MHz)
(default)
Clock Ratio CPU (Host)
2X 66
3X 100
3X, overclocking 110 36.6
4X 133
4X, overclocking 150 37.5
Warning: INTEL i815E 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
because of overclocking, simply use JP14 to
Home clear CMOS and restore to the default setting.
JP23 JP29 JP23 JP29
1 2 1 2 1 2
5 6 5 6
5 6
2X
3X
(66MHz)
(100MHz)
PCI AGP Memory
33 66 100
33 66 100
73 110
33 66 100
75 150
1 2
5 6