AOpen nCK804a-LFS Installation Manual page 5

Setting CPU Voltage & Frequency
Setting CPU Core Voltage
This motherboard supports Voltage ID (VID) function to detect CPU voltage
automatically during power-on. However, if users are willing to do overclocking,
we also provide a range from 0.80V to 1.55V in the BIOS. Sometimes increasing
the original core voltage a little bit will lead the CPU overclock more properly.
Setting CPU Frequency
This motherboard is CPU jumper-less design, you can set CPU frequency through
1MHz stepping CPU Overclocking in the BIOS. CPU Core Frequency = CPU FSB
clock x CPU Ratio. However, all CPU now selling in the market belong to "Fixed
Multiplier". That means users can not adjust the CPU Ratio but only change CPU
FSB clock to achieve overclocking.
(Users do the overclocking at their own risk!!)
BIOS Setup > Frequency / Voltage Control > CPU Speed Setup
CPU Ratio From 4x to 25x step 1x
CPU Clock
FSB = 200 MHz-250 MHz by 1 MHz Stepping CPU Overclocking
(Adjustment manually)
CPU Core
CPU
Freq.
1800MHz
Athlon 64 3000+
Athlon 64 3200+ 2000MHz
2200MHz
Athlon 64 3500+
2200MHz
Athlon 64 3700+
2400MHz
Athlon 64 3800+
2400MHz
Athlon 64 4000+
2000MHz
Athlon 64 Sempron 3200+
Note: With CPU speed changing rapidly, there might be faster CPU on the market by the time you
received this installation guide. This table is kindly for your references only, please contact with your
distributor for more information.
Note: 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 ABS"
reset the system in five seconds and system will auto-detect hardware again.
Warning: Supposed you have had adjusted CPU ratio on your current CPU, and you
plan to replace a new CPU. Please use <Home> key or Clear CMOS to restore the default
setting when changing a new CPU, because the system will still implement the previous
CPU setting on the new one.
CPU Clock L2 Cache Ratio
512KB
200MHz 9x
512KB
200MHz 10x
200MHz 512KB 11x
200MHz 1024KB 11x
512KB
200MHz 12x
1024KB
200MHz 12x
256KB
200MHz 10x
Gigabit LAN onboard
On the strength of Gigabit LAN controller on board, this motherboard provides
10/100/1000 Mbps Ethernet for office and home use. The Ethernet RJ45
connector is located on top of USB connectors. The right hand side LED indicates
link mode, it lights in orange whenever linking to network. The left hand side
LED indicates the transfer mode and it lights in green when data is transferring
in 100Mbps (never lights while in 10Mbps), but lights in orange when
transferring in Gigabit's mode. To enable or disable this function, you may
simply adjust it through BIOS.
JP14 Clear CMOS
You can clear CMOS to restore system default
setting. To clear the CMOS, follow the procedure
below.
1. Turn off the system and unplug the AC power.
2. Remove ATX power cable from connector PWR2.
3. Locate JP14 and short pins 2-3 for a few seconds.
4. Return JP14 to its normal setting by shorting pin 1
& pin 2.
5. Connect ATX power cable back to connector PWR2.
Pin 1
1 1
Normal Clear CMOS
(default)
Transferring (Left)
Green 100Mbps
Orange Gigabit mode
Linking (Right)
Orange
Tip: When should I Clear CMOS?
1. Boot fails because of overclocking...
2. Forget password...
3. Troubleshooting...