This jumper is used to specify the relationship of PCI and FSB 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.
3. Installing CPU and Fan
4. JP29/JP23 FSB/PCI Clock Ratio
Plug CPU to Socket370 connector. Be careful of
CPU orientation. Plug in the fan cable to the 3-pin
CPUFAN
or
FAN
connector.
GND
+12V
SENSOR
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 > Chipset Features Setup > CPU Clock Ratio
CPU Ratio
1.5x, 2x, 2.5x, 3x, 3.5x, 4x, 4.5x, 5x, 5.5x, 6x, 6.5x, 7x, 7.5x, and 8x
CPU FSB
66.8, 75, 83.3, 100, 103, 105, 110, 112, 115, 120, 124, 133,
140, and 150 MHz.
Core Frequency = CPU FSB Clock * CPU Ratio
CPU
CPU Core Frequency
FSB Clock
Ratio
CELERON 300A
300MHz
66MHz
4.5x
CELERON 600
600MHz
66MHz
9x
CELERON 700
700MHz
66MHz
10.5x
CELERON 800
800MHz
100MHz
8x
CELERON 850
850MHz
100MHz
8.5x
Pentium!!! 700E
700MHz
100MHZ
7x
Pentium!!! 750E
750MHz
100MHZ
7.5x
Pentium!!! 800E
800MHz
100MHZ
8x
Pentium!!! 850E
850MHz
100MHZ
8.5x
Pentium!!! 733EB
733MHz
133MHZ
5.5x
Pentium!!! 866EB
866MHz
133MHZ
6.5x
Pentium!!! 933EB
866MHz
133MHZ
7x
Pentium!!! 1G
1GHz
133MHZ
7.5x
Pentium!!! 1.13G
1.13GHz
133MHz
8.5
Note:
Some CPU fans do not have
sensor pin, so that cannot support
fan monitoring.
Warning:
VIA 694x chipset supports maximum 133MHz FSB and
66MHz AGP clock, higher clock setting may cause serious system
damage.
Home
Tip:
If your system hangs or fails to boot
because of overclocking, simply use
<Home> key to restore the default setting
(233MHz).
Clock Ratio
CPU (Host)
PCI
AGP
Memory
2X
66
33
66
PCI x2 or x3
3X
100
33
66
PCI x2 or x3 or x4
3X, overclocking
112
37.3
74.6
PCI x2 or x3 or x4
4X
133
33
66
PCI x3 or x4
4X, overclocking
150
37.5
75
PCI x3 or x4
JP29 JP23
4X
(133~150MHz)
3X
(100~124MHz)
2X
(66~83MHz)
JP29 JP23
JP29 JP23
Auto
(default)
JP29 JP23
1
2
5
6
JP29
JP23
