mam uplne stejny problem, psal jsem do gigabytu n atech support a tohle mi odpovedeli:
Thank you for supporting GIGABYTE products and contacting GBT Tech Support.
As to the problem you mentioned, the overclock result will depend on your peripheral devices, and the CPU maximum performance. It might be the CPU cannot reach so high FSB freq. We will not guarantee any result caused by system overclocking.

BTW, the CPU Vcoer might be increased to get more system stability when overclocking sometimes, but please be informed that it might cause H/W damage. In addition, the CPU speed must match with the frequency ratio. It will cause system hanging up if the frequency ratio is higher then that of CPU. And we are not responsible for any results from overclock. Please also be careful of the overheat problem.

At last, if there is any further question or suggestion about our products/service, please do not hesitate to contact us. We will try to help you to resolve them as soon as we can.

Best Regards,
GIGABYTE Technology

takze nic konkretniho, jen obecny kecy, psal jsem jim znovu, ze ocekavam konretni odpoved, pripadne novy bios F6 ktery tento problem resi. nekdo na foru CC u teto desky ma stejny problem - jestli to nejsi ty.