I've got an Epox EP-8RDA3+ Pro motherboard (Nforce 2 Ultra) running WinXp Pro. Previously I was using two 512MB ddr 333 memory sticks with my FSB running at 166Mhz, and the computer was working fine. I recently purchased a pair of 2GB Corsair XMS matched PC3200 sticks. When I raised the FSB to 200Mhz in the bios, my WinXP system became unstable and I got blue screens. I was using conservative auto memory settings. I thought the motherboard was designed to operate at this speed properly, considering I now have memory that will handle that speed. I'm using the latest bios. My only other thoughts are maybe that my PCI bus or AGP video card can't handle this. Any ideas would be appreciated.