Weird, I run 4 X 150GB Raptors in raid 0 with this board under vista 64bit, with bios 0402 and 0404 without problems, also have my Q6600 at either 8 X 400fsb for 3.2GHz or 9 X 400fsb for 3.6GHz while running 8gb of ram.

One thing I notice though is in the Intel Matrix Storage Console in windows the Serial ATA Transfer Mode is shown as Generation 1 and I know the WD Raptors are SATA II drives....WTF?...or perhaps I'm missing something.