Gigabyte GA-8IG1000MF Series User Manual page 55

CPU Host Frequency (Mhz)
100MHz ~ 355MHz
Incorrect using it may cause your system broken. For power End-User use only!
AGP/PCI/SRC Fixed
Serial ATA device is very sensitive to SRC clock. SRC over clock may make Serial ATA device
function can't work properly.
Adjust AGP/PCI/SRC clock asychrohous with CPU.
Memory Frequency For
for FSB(Front Side Bus) frequency=400MHz,
2.66 Memory Frequency = Host clock X 2.66.
Auto Set Memory frequency by DRAM SPD data. (Default value)
for FSB(Front Side Bus) frequency=533MHz,
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)
for FSB(Front Side Bus) frequency=800MHz,
2.0 Memory Frequency = Host clock X 2.0.
1.6 Memory Frequency = Host clock X 1.6.
1.33 Memory Frequency = Host clock X 1.33.
Auto Set Memory frequency by DRAM SPD data. (Default value)
Memory Frequency (Mhz)
The values depend on CPU Host Frequency(Mhz) .
AGP/PCI/SRC Frequency (Mhz)
The values depend on Fixed AGP/PCI/SRC Frequency.
Set CPU Host Clock from 100MHz to 355MHz.
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BIOS Setup