I just built a Core i7 920 system on an Asus P6T Deluxe V2 motherboard. 12GB G.Skill RAM, 850W PSU, GTX 280, Vista Ultimate x64. It's been running fine for a few weeks. Today, I installed an aftermarket Cooler Master CPU cooler. After the install, I started it back up. Windows loaded fine, I logged in and loaded RealTemp to check on how much difference the new cooler made. After a few seconds, the system turned off, and now refuses to turn back on. After it died, there was a strange smell in the air as well. At first I thought the power supply may have died, but it will run another machine and checks out on my PSU tester. Right now, with the essentials plugged in, double and triple checked, hitting the power button will give a very quick (1/4 sec) burst of power that will light up LED's and crank the fans around maybe 1/8 of a turn before everything shuts off. There was no smoke and I don't see any physical deformities on any components. There was the strange smell however. I don't have another system to test the mobo/CPU, so I could really use some help here. I have less than a week before the motherboard is out of NewEgg's 30 day exchange policy. My guess is that it's the motherboard, not the processor. Then again, I haven't had one die on me before. What do you think? Thanks for any help.