Hi fellow TPU members, not too long ago, the box my gf's PC was transported in gave way on the stairs. Yes, you got it right, that sent a PC tumbling down a flight of steps alright. Stuff broke. Also, stuff remained intact somehow. I bought her a new case, new CPU cooler and we removed the floppy drive, so far so good. But the PC started crashing for no apparent reason, without a BSOD. I tested: Memtest86+, left overnight, 0 errors Scanned the HDD for errors, nothing there Left FurMark burning up the GFX card and drawing some power, no problems there Ran Ubuntu from a Live CD doing nothing special, didn't crash Ran OCCT, Linpack, Prime95, all 3 caused reboots within minutes Oh, and I disabled "Restart on error" so I'm sure it's not a BSOD. Now, I can still try and test something CPU intensive on Ubuntu, but my guess is the CPU didn't survive. Before I do anything drastic like whippin' out the magic wallet and get her a new AMD quad, is there anything I didn't see? I'm guessing the motherboard could be borkered as well, but can I check that other than replacing the CPU with a working one? Any suggestions on which proggies I can use from an Ubuntu Live CD to stress the CPU?