I have heard that some Sandy Bridge processors cannot be overclocked much on these motherboard due to BIOS limitation or BIOS lock something. I am not sure but some says that this issue is official announced from the Gigabyte side. Even if you have “k” series unlocked processor, the motherboard will restrict the overclocking point at certain limit and I think that is approximately 3.8GHZ. It means the Z68 motherboard partially compatible for overclocking Intel core processors with “K” models. I tried to overclock my Core i7-3770K processor on GA-Z68x-UD7/B3 motherboard but during the OC process I have found that the multiplier locked at x39. I cannot pass that limit. Many users reported the same in various forums. Do you think that Gigabyte already released a BIOS update to fix this issue?
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