The bios's are programmed according to CPU specs, when you load the Optimized Defaults, it loads everything based on the cpu thats installed at that time.
Hopefully that will do the trick for you.
If that doesnt fix the issue, then i dunno. Could be an MSI board problem. I wouldnt put it past them. I have a MSI and have nothing but problems with it. But im
not gonna go into that rant on your thread lol. Let us know if that does the trick for you or not.
i7 2600K - Asus Maximus Extreme-Z - G.Skill DDR3 2133 CL9 - MSI 5870 - Corsair 1200w PSU - 2 x Western Digital Raptors Raid 0 - Swiftech Apogee XT Water Block - Swiftech MCP655 Pump - 120mm Quad Rad - Windows 7 - Ubuntu x64 5311Mhz Validation