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3. Installing CPU & Housing Fan
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.
SYSFAN2 Connector
4. JP21 K7 Host Clock Selection
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.
GND
+12V
SENSOR
SYSFAN3 Connector
GND
+12V
SENSOR
CPUFAN1 Connector
Note: Some CPU fans do not have
sensor pin, so that they cannot
support fan monitoring.
Pin 1
JP21 K7 Host Clock
Select Jumper
1
1
Auto
133MHz
(Default)
5. Setting CPU Voltage & Frequency
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
From 5.5x to 16.5x step 0.5x; 17x to 18x step 1x
CPU Ratio
CPU FSB (By manual
FSB=133, 130~165 by 1MHz stepping adjustment technology
Adjustment)
FSB=166, 161~199 by 1MHz stepping adjustment technology
CPU
CPU Core Frequency
Athlon 1G
1GHz
Athlon 1.13G
1.13GHz
Athlon 1.2G
1.2GHz
Athlon 1.33G
1.33GHz
Athlon 1.4G
1.4GHz
AthlonXP 1500+
1.3GHz
AthlonXP 1600+
1.4GHz
AthlonXP 1700+
1.46GHz
AthlonXP 1800+
1.53GHz
AthlonXP 1900+
1.6GHz
AthlonXP 2000+
1.667GHz
AthlonXP 2100+
1.73GHz
AthlonXP 2200+
1.80GHz
AthlonXP 2400+
2.0GHz
AthlonXP 2600+
2.13GHz
AthlonXP 2500+
1.83GHz
AthlonXP 2700+
2.16GHz
AthlonXP 2800+
2.083GHz
AthlonXP 3000+
2.167GHz
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.
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.
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.
EV6 Bus Clock
Ratio
266MHz
7.5x
Warning:
266MHz
8.5x
KM400
266MHz
9.0x
266MHz
10.0x
supports 166MHz
266MHz
10.5x
FSB
266MHz
10.0x
266MHz
10.5x
performance
266MHz
11.0x
266MHz
11.5x
reaches maximum
266MHz
12.0x
333MHz
266MHz
12.5x
266MHz
13x
system bus) and
266MHz
12.5x
66MHz
266MHz
13.5x
266MHz
15x
clock, higher clock
333MHz
11x
setting may cause
333MHz
13x
333MHz
13.5x
serious
333MHz
13x
damage.
®
VIA
chipset
(with
EV6
AGP
system
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