Gigabyte GA-945GCM-S2 User Manual page 46

PCI Express Frequency (Mhz)
When you use a PCI Express x16 graphics card:
Auto Set PCI Express frequency automatically. (Default value)
90~150 Set PCI Express frequency from 90 MHz to 150 MHz.
When you use a onboard VGA port:
Auto Set PCI Express frequency automatically. (Default value)
SYC Set PCI Express frequency to SYC.
ASYC Set PCI Express frequency to ASYC.
System Memory Multiplier
The adjustable range will vary based on the CPU FSB. Default value: Auto (set memory
frequency by DRAM SPD data). Wrong frequency settings may cause system unable to boot.
Clear CMOS to overcome wrong frequency issue.
Memory Frequency (Mhz)
The values depend on CPU Host Frequency (Mhz) and System Memory Multiplier setting.
GA-945GCM-S2 (rev. 2.1) Motherboard - 46 -