Plug in the CPU fan cable to the 3-pin
CPUFAN1
connector. If you have chassis fan, you
can also plug it on
SYSFAN2
or
SYSFAN3
connector.
5. Setting CPU Voltage & Frequency
4. JP21 K7 Host Clock Selection
3. Installing CPU & Housing Fan
This jumper is used to specify the relationship of PCI and FSB clock. Generally speaking, if
you are not an over-clocker, we recommend you to set it to the default setting. Additionally,
this motherboard also provides “1MHz Stepping CPU Adjustment” feature for overclockers
to adjust CPU FSB frequency via BIOS setup program. Based on the CPU type, the
adjustment has two levels, Auto and 133MHz, for your choosing. If you fix the CPU FSB
frequency by JP21, the “1MHz Stepping CPU Adjustment” range will be changed and follow
the JP21 setting.
Note: Some CPU fans do not have
sensor pin, so that they cannot
support fan monitoring.
CPUFAN1 Connector
SYSFAN2 Connector
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
CPU Ratio
From 5.5x to 16.5x step 0.5x; 17x to 18x step 1x
CPU FSB (By manual
Adjustment)
FSB=133, 130~165 by 1MHz stepping adjustment technology
FSB=166, 161~199 by 1MHz stepping adjustment technology
CPU
CPU Core Frequency
EV6 Bus Clock
Ratio
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+
1.667GHz
266MHz
12.5x
AthlonXP 2100+
1.73GHz
266MHz
13x
AthlonXP 2200+
1.80GHz
266MHz
12.5x
AthlonXP 2400+
2.0GHz
266MHz
13.5x
AthlonXP 2600+
2.13GHz
266MHz
15x
AthlonXP 2500+
1.83GHz
333MHz
11x
AthlonXP 2700+
2.16GHz
333MHz
13x
AthlonXP 2800+
2.083GHz
333MHz
13.5x
AthlonXP 3000+
2.167GHz
333MHz
13x
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.
SYSFAN3 Connector
JP21 K7 Host Clock
Select Jumper
Warning: VIA
®
KM400 chipset
supports 166MHz
FSB (with
performance
reaches maximum
333MHz EV6
system bus) and
66MHz AGP
clock, higher clock
setting may cause
serious system
damage.
Tip: If your system hangs or fails to boot when overclocking, please use <Home> key
to restore the default setting or wait AOpen “Watch Dog ABS” for resetting the system
in few seconds and the system will auto-detect hardware again.
Warning: If you have adjusted CPU ratio on your current CPU and plan to replace a new
CPU, please use <Home> key or Clear CMOS to restore the default setting. The system
will implement the previous CPU setting on the new one.
GND
+12V
SENSOR
GND
+12V
SENSOR
Pin 1
1
Auto
(Default)
1
133MHz
