Setting CPU Voltage & Frequency
Setting CPU Core Voltage
This motherboard supports Voltage ID (VID) function to detect CPU voltage
automatically during power-on.
Setting CPU Frequency
This motherboard is CPU jumper-less design, you can set CPU frequency through
1MHz stepping CPU Overclocking in the BIOS. CPU Core Frequency = CPU FSB
clock x CPU Ratio. However, all CPU now selling in the market belong to "Fixed
Multiplier". That means users can not adjust the CPU Ratio but only change CPU
FSB clock to achieve overclocking.
(Users do the overclocking at their own risk!!)
BIOS Setup > Frequency / Voltage Control > CPU Speed Setup
CPU Ratio
8x, 10x… 21x, 22x, 23x, 24x
CPU FSB
(Adjustment manually)
FSB = 100MHz-248MHz by 1MHz
Stepping CPU Overclocking
P4 CPU
CPU Core
Freq.
FSB
Clock
System
Bus
Ratio
Pentium 4 1.8G
1800MHz
100MHz
400MHz
18x
Pentium 4 2.0G
2000MHz
100MHz
400MHz
20x
Pentium 4 2.2G
2200MHz
100MHz
400MHz
22x
Pentium 4 2.2G
2200MHz
133MHz
533MHz
16x
Pentium 4 2.26G
2260MHz
133MHz
533MHz
17x
Pentium 4 2.4G
2400MHz
100MHz
400MHz
24x
Pentium 4 2.4G
2400MHz
133MHz
533MHz
18x
Pentium 4 2.53G
2530MHz
133MHz
533MHz
19x
Pentium 4 2.66G
2660MHz
133MHz
533MHz
20x
Pentium 4 2.8G
2800MHz
133MHz
533MHz
21x
Pentium 4 3.06G
3066MHz
133MHz
533MHz
23x
Note: With CPU speed changing rapidly, there might be faster CPU on
the market by the time you received this installation guide. This table
is kindly for your references only.
JP14 Clear CMOS
JP28 Keyboard/Mouse Wakeup Jumper
This motherboard provides keyboard / mouse wake-up function. You can use JP28
to enable or disable this function, which could resume your system from suspend
mode with keyboard or mouse. The factory default setting is “Disable” (1-2), and
you may enable this function by setting the jumper to 2-3.
You can clear CMOS to restore system default
setting. To clear the CMOS, follow the procedure
below.
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 pin 1
& pin 2.
5. Connect ATX power cable back to connector PWR2.
Pin 1
Pin 1
Note: Some CPU
fans do not have
sensor pin so they
cannot support fan
monitoring.
Warning: SIS
651 chipset support
maximum 533MHz
(133MHz*4) system
bus and 66MHz AGP
clock; higher clock
setting may cause
serious system
damage.
Tip: When should I Clear CMOS?
1. Boot fails because of overclocking…
2. Forget password…
3. Troubleshooting…
Normal
(default)
1
Clear CMOS
1
Note: SIS 651 chipset support Intel P4 processor. P4
processor could detect the clock ratio automatically; you
may not be able to adjust the clock ratio in BIOS manual.
Enable
Disable
(Default)
1
1
