
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.
4. JP21 FSB/PCI Clock Ratio
5. Setting CPU Voltage & Frequency
3. Installing CPU & Housing Fan
This jumper is used to specify the relationship of PCI and FSB clock. Generally speaking, i
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 adjus
CPU FSB frequency via BIOS setup program. Based on the CPU type, the adjustment range
has two levels: 100~129 (FSB=100, such as Athlon 800), 130~248 (FSB=133, such as
thlon 1000) MHz for your choosing. You may also choose a specific FSB frequency ranging
from 100~117 (say, 105, 110, 115 for example) and 120~156 with reference to a frequenc
table in BIOS setup program. If you fix the CPU FSB frequency by JP21, the “1MHz
SteppingAdjustment” range will be changed and following JP21 setting.
Note: Some CPU fans do not have
sensor pin, so that cannot support
fan monitorin
.
CPUFAN1 Connector
SYSFAN3 Connector
GND
+12V
Sensor
Setting CPU Core Voltage
This motherboard supports CPU VID function. The CPU core voltage will be automatically
detected and the range is from 1.1V to 1.85V. 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 Speed Setup
Core Frequency = CPU FSB Clock * CPU Ratio
CPU Ratio From 5.5x to 12.5x step 0.5x
CPU FSB (By BIOS table) 100, 102, 105, 108, 110, 113, 115, 117, 120, 122, 124, 133, 136, 138,
140, 142, 144, 147, 152, 154, and 156MHz.
CPU FSB (By manual
Adjustment) FSB=100, 100~129 by 1MHz stepping adjustment technology
FSB=133, 130~248 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+ 1.667GHz 266MHz 12.5x
AthlonXP 2100+ 1.73GHz 266MHz 13x
AthlonXP 2200+ 1.80GHz 266MHz 13.5x
AthlonXP 2400+ 2.0GHz 266MHz 15x
AthlonXP 2600+ 2.13GHz 266MHz 16x
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
Tip: If your system hangs or fails to boot because of
overclocking, simply use <Home> key to restore the default
setting or you can wait the AOpen “Watch Dog Timer” reset
the system in five seconds and system will auto-detect
hardware again.
Warning: VIA®Apollo KT333 chipset supports 133MHz FSB (with
erformance reaches ma
imum 266MHz EV6 system bus) and 66MHz
GP clock, higher clock setting may cause serious system damage.
100MHz 133MHz
(Default)
1 1
GND
+12V
SENSOR
SENSOR
+12V
GND
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 ++--
CPUDefault0000
SW1 CPU Ratio
Select Switch
- +
1
2
3
4
SYSFAN2 Connector