Plug in the CPU fan cable to the 3-pin
CPU FAN
connector. If you have chassis fan, you
can also plug it on
System FAN
(FAN2)
or
AUX FAN
(FAN3)
connector.
CPU Ratio
From 5.0x to 12.5x step 0.5x
CPU FSB (By BIOS table)
100, 103, 107, 110, 112, 124, 133, 137, 143, 147, and 166MHz.
CPU FSB (By manual
Adjustment)
FSB=100, 100~123 by 1MHz stepping adjustment technology
FSB=133, 124~200 by 1MHz stepping adjustment technology
CPU
CPU Core Frequency
EV6 Bus Clock
Ratio
Athlon 1G
1GHz
200MHz
10.0x
Athlon 1.1G
1.1GHz
200MHz
11.0x
Athlon 1.2G
1.2GHz
200MHz
12.0x
Athlon 1.3G
1.3GHz
200MHz
13.0x
Athlon 1G
1GHz
266MHz
7.5x
Athlon 1.13G
1.13GHz
266MHz
8.5x
Athlon 1.2G
1.2GHz
266MHz
9.0x
Athlon 1.33G
1.33GHz
266MHz
10.0x
Athlon 1.4G
1.4GHz
266MHz
10.5x
AthlonXP 1500+
1.3GHz
266MHz
10.0x
AthlonXP 1600+
1.4GHz
266MHz
10.5x
AthlonXP 1700+
1.46GHz
266MHz
11.0x
AthlonXP 1800+
1.53GHz
266MHz
11.5x
AthlonXP 1900+
1.6GHz
266MHz
12.0x
AthlonXP 2000+
2GHz
266MHz
12.5x
Duron 800
800MHz
200MHz
8.0x
Duron 850
850MHz
200MHz
8.5x
Duron 900
900MHz
200MHz
9.0x
Duron 950
950MHz
200MHz
9.5x
Duron 1G
1GHz
200MHz
10.0x
Duron 1.1G
1.1GHz
200MHz
11.0x
5. Setting CPU Voltage & Frequency
Setting CPU Core Voltage
This motherboard supports CPU VID function. The CPU core voltage will be automatically
detected.
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 Speed Setup
Core Frequency = CPU FSB Clock * CPU Ratio
Warning: SIS 745 Chipset supports maximum 266MHz (EV6)
system bus and 66MHz AGP clock; higher clock setting may cause
serious system damage.
4. JP21 FSB/PCI Clock Ratio
This jumper is used to specify the relationship of PCI and FSB clock. Generally speaking, if
you are not overclockers, we recommend you to set at the default setting. Additionally, this
motherboard also provides “
1MHz Stepping Adjustment
” feature for overclockers to adjust
CPU FSB frequency via BIOS setup program. Based on the CPU type, the adjustment
range has two levels: 100~123 (FSB=100, such as Athlon 800), 124~200 (FSB=133, such
as Athlon 1000) MHz for your choosing. You may also choose a specific FSB frequency
ranging from 100~124 (say, 105, 110, 115 for example) and 133~166 with reference to a
frequency table in BIOS setup program. If you fix the CPU FSB frequency by JP21, the
“1MHz Stepping Adjustment” range will be changed and following JP21 setting. To adjust
CPU clock ratio, you may just adjust the select switch as table shows.
Warning: High CPU core voltage may be able to
increase CPU speed for overclocking, but you may
damage the CPU or reduce the CPU lifecycle.
100MHz
(Default)
133MHz
Note: Some CPU fans do not have
sensor pin so they cannot support fan
monitoring.
CPU Fan Connector
3. Installing CPU & System Fan
FAN3 Connector
FAN2 Connector
GND
+12V
SENSOR
GND
+12V
SENSOR
GND
+12V
SENSOR
SW1 CPU Ratio
Select Switch
-
1
2
3
4
CPU Ratio
SW1-1
SW1-2
SW1-3
SW1-4
5
－
－
＋
－
5.5
＋
－
＋
－
6
－
＋
＋
－
6.5
＋
＋
＋
－
7
－
－
－
＋
7.5
＋
－
－
＋
8
－
＋
－
＋
8.5
＋
＋
－
＋
9
－
－
＋
＋
9.5
＋
－
＋
＋
10
－
＋
＋
＋
10.5
＋
＋
＋
＋
11
－
－
－
－
11.5
＋
－
－
－
12
－
＋
－
－
12.5
＋
＋
－
－
CPU Default
0
0
0
0
+
