Gigabyte GA-8I945G Pro User Manual page 45

Turbo Set C.I.A.2 to Turbo. (Automatically increase CPU frequency(15%,17%) by
CPU loading.
Full Thrust Set C.I.A.2 to Full Thrust. (Automatically increase CPU frequency(17%, 19%)
by CPU loading.
Warning: Stability is highly dependent on system components.
CPU Host Clock Control
Please note that if your system is overclocked and cannot restart, please wait 20secs.
for automatic system restart or clear the CMOS setup data and perform a safe restart.
Disabled Disable CPU Host Clock Control. (Default value)
Enabled Enable CPU Host Clock Control.
CPU Host Frequency (Mhz)
100MHz ~ 600MHz
If you use FSB533 Pentium 4 processor, please set "CPU Host Frequency" to 133MHz.If you use
FSB800 Pentium 4 processor, please set "CPU Host Frequency" to 200MHz.
Incorrect using it may cause your system broken. For power End-User use only!
PCI Experss Frequency (Mhz)
ASYC Set PCI Express frequency to ASYC.
Auto BIOS will automatically setup the PCI Express Frequency. (Default value)
System Memory Multiplier
Wrong frequency may make system can't boot, clear CMOS to overcome wrong frequency issue.
for FSB(Front Side Bus) frequency=533MHz,
3 Memory Frequency = Host clock X 3.
4 Memory Frequency = Host clock X 4.
Auto Set Memory frequency by DRAM SPD data. (Default value)
for FSB(Front Side Bus) frequency=800MHz,
2.0 Memory Frequency = Host clock X 2.0.
2.66 Memory Frequency = Host clock X 2.66.
3.33 Memory Frequency = Host clock X 3.33.
Auto Set Memory frequency by DRAM SPD data. (Default value)
for FSB(Front Side Bus) frequency=1066MHz,
1.5 Memory Frequency = Host clock X 1.5.
2.0 Memory Frequency = Host clock X 2.0.
2.5 Memory Frequency = Host clock X 2.5.
Auto Set Memory frequency by DRAM SPD data. (Default value)
Memory Frequency (Mhz)
The values depend on CPU Host Frequency (Mhz) and System Memory Multiplier setting.
DIMM OverVoltage Control
Please note that by overclocking your system through the increase of the DIMM voltage, damage
to the memory may occur.
Normal Set DIMM OverVoltage Control to Normal. (Default value)
+0.1V Set DIMM OverVoltage Control to +0.1V.
+0.2V Set DIMM OverVoltage Control to +0.2V.
+0.3V Set DIMM OverVoltage Control to +0.3V.
+0.4V Set DIMM OverVoltage Control to +0.4V.
Set CPU Host Frequency from 100MHz to 600MHz.
- 45 - BIOS Setup