This motherboard comes with a 20-pin and 4-pin ATX power connector as shown below.
Make sure you plug in the right direction. We strongly recommend you to insert the 4-pin
connector before connecting the 20-pin connector.
5. Setting CPU Voltage & Frequency
4. Connecting Front Panel Cable
3. Connecting ATX Power Connector
Full-range Adjustable CPU Core Voltage
This motherboard supports CPU VID function. The CPU core voltage will be automatically
detected and the range is from 0.8375V to 1.6000V. It is not necessary to set CPU Core
Voltage.
Setting CPU Frequency
This motherboard is CPU jumper-less design, you can set CPU frequency through the
BIOS setup, and no jumpers or switches are needed.
BIOS Setup > Frequency / Voltage Control > CPU Bus Frequency
Core Frequency = CPU FSB Clock * CPU Ratio
CPU Ratio
8x, 10x… 24x, 25x, 26x, 27x, 28x
CPU FSB
(Adjustment manually)
FSB = 100MHz-248MHz by 1MHz Stepping
CPU Overclocking
Northwood
CPU
CPU Core
Frequency
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 2.6G
2600MHz
200MHz
800MHz
13x
Pentium 4 2.66G
2660MHz
133MHz
533MHz
20x
Pentium 4 2.8G
2800MHz
133MHz
533MHz
21x
Pentium 4 2.8G
2800MHz
200MHz
800MHz
14x
Pentium 4 3.06G
3066MHz
133MHz
533MHz
23x
Pentium 4 3.20G
3200MHz
200MHz
800MHz
16x
Note:
With CPU speed changing rapidly, there might be fastest CPU on
the market by the time you received this installation guide. This table is
kindly for your references only.
Attach the power LED, speaker, and reset switch connectors to the corresponding pins. If
you enable “Suspend Mode” item in BIOS Setup, the ACPI & Power LED will keep flashing
while the system is in suspend mode.
Locate the power switch cable from your ATX housing. It is 2-pin female connector from the
housing front panel. Plug this connector to the soft-power switch connector marked
SPWR
.
Note:
SiS 655FX/964
chipset only support
Northwood processor
(also support Celeron
CPU with Northwood
core). Northwood
processor would detect
the clock ratio
automatically; you may
not be able to adjust the
clock ratio in BIOS
manually.
Warning:
SiS655FX/964
chipset support maximum
800MHz (200MHz*4)
system bus and 66MHz
AGP clock; higher clock
setting may cause serious
system damage.
1
SPEAKER
IDE LED
Power Switch
ACPI & Power LED
RESET
SPWR
GND
ACPILED-
GND
NC
NC
GND
RESET
GND
NC
NC
+5V
IDE LED
IDE LED
+5V
+5V
GND
NC
SPEAKER
1
