AOpen MX3S Easy Installation Manual page 3

Installing CPU and Fan
Plug CPU to Socket370. Be careful of CPU orientation.
Plug in the fan cable to the 3-pin CPUFAN or FAN 1
connector.
Auto-Detect 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 2x, 2.5x, 3x, 3.5x, 4x, 4.5x, 5x, 5.5x, 6x, 6.5x, 7x, 7.5x, and 8x
CPU FSB (By BIOS table) 66.8, 68.5, 75, 83.3, 100, 103, 112, 117, 124, 129, 133.3, 138, 143, 148, 150MHz.
CPU FSB (By manual 66~166MHz by 1MHz stepping adjustment technology
Adjustment)
Core Frequency = CPU FSB Clock * CPU Ratio
CPU CPU Core Frequency FSB Clock
Celeron 300A 300MHz 66MHz
Celeron 600 600MHz 66MHz
Pentium III 600E 600MHz 100MHz
Pentium III 650E 650MHz 100MHz
Pentium III 700E 700MHz 100MHz
Pentium III 750E 750MHz 100MHz
Pentium III 800E 800MHz 100MHz
Pentium III 850E 850MHz 100MHz
Pentium III 533EB 533MHz 133MHz
Pentium III 600EB 600MHz 133MHz
Pentium III 667EB 667MHz 133MHz
Pentium III 733EB 733MHz 133MHz
Pentium III 800EB 800MHz 133MHz
Pentium III 866EB 866MHz 133MHz
Pentium III 933EB 933MHz 133MHz
Pentium III 1000EB 1GHz 133MHz
GND
+12V
SENSOR
Note: Some CPU fans do not
have sensor pin, so that cannot
support fan monitoring.
Ratio
4.5x
9x
6x
6.5x
7x
7.5
8x
8.5x
4x
4.5x
5x
5.5
6x
6.5
7x
7.5x
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) PCI
2X 66 33
3X 100 33
3X, overclocking 110 36.6
4X 133 33
4X, overclocking 150 37.5
Warning: INTEL i815E/i815EP 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
clear CMOS and restore to the default setting .
JP23 JP29 JP23 JP29
1 2 1 2 1 2 1 2
5 6 5 6
5 6
5 6
2X
3X
(66MHz)
(100MHz)
AGP Memory
66 100
66 100
73 110
66 100
75 150