I posted in this forum several months ago. My Minidumps at the time showed a cpu problem. I have since replaced the cpu, power supply, and motherboard and still can't get away from these intermittent blue screens. I have attached some more recent dumps from some testing I've been doing with a fresh install of XP. They all seem to indicate a machine check problem w/ cpu, ram, motherboard or powersupply. when those have all been replaced, I'm at a loss. ideas?