Because the CPU itself is not tolerant to higher than 1.5v. (click here), I'd recommend checking with OCZ and Corsair on the memory voltage of your modules. If they are all 1.5v., and you are using SATA ports 0 and/or 1 (click here for more details on why), then, based on the tests you've done, I'd next suggest either trying the CPU out on another, compatible, testing desktop board or having another compatible, testing processor on your Gigabyte* desktop board.
CORSAIR has come out with a new series of low volt Mem. 1.3 . I'd take a look at this .