ASROCK N68-GS UCC User Manual page 10

16. This motherboard supports ASRock AM2 Boost overclocking technology. If
you enable this function in the BIOS setup, the memory performance will
improve up to 12.5%, but the effect still depends on the AM2 CPU you adopt.
Enabling this function will overclock the chipset/CPU reference clock. However,
we can not guarantee the system stability for all CPU/DRAM configurations.
If your system is unstable after AM2 Boost function is enabled, it may not be
applicative to your system. You may choose to disable this function for
keeping the stability of your system.
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