On my mobo, I have the onboard highpoint raid/ata100 controller. When I o/c to 36 or higher pci my hdd test in pcmark is skipped. I figure it's the controller crappin out on me. My regular IDE slots support ata100 also, so do you think that switching to them will make a difference? I can put my cdrw and cd-rom on the secondary which wouldn't be so bad since I never burn disc to disc. I'm wondering tho, if it's just my WD hdd. I've read from others that they don't like anything higher than 37 pci, so this would still bring me from 1837 on my xp2000 to 1888. Thanks for any help.