Any help would be greatly appreciated. Here's my system: p4 1.6a @ 2133, Abit TH7 II Raid w/39c BIOS, 512 MB RDRAM consisting of 4 sticks of 128MB, 8 device Samsung. I've been running @ 2133 (memory @ 4X) for about 2 months perfectly stable. Vcore has been @ 1.575. I'm having problems with XP...