Funkers, I soon found the Enermax Galaxy had problems with the IX38 so now have CoolerMaster Pro 850w - no problems.
I didn't have the x8 problems with the boards original 11 BIOS, don't think I tried x8 on the B03 but I certainly do have problems with the B05!
SuperShanks said he did have some similar problems but the board sorted itself out eventually - just keep trying. Maybe worth trying to re-flash the BIOS.
Out of interest, what batch is your CPU? Mine is L731B509
(need to update my comp specs - sorry)