I am not new to building computers. This has me stumped, as well as hacked. I just assembled an Intel Quad Core 2.4ghz in an AsusP5ke motherboard. Only the Video card and RAM are installed. Taking out/switching the RAM sticks makes no difference. Case and CPU fans spin up for a few seconds then all dies. This suggests the CPU/mobo is not getting past the Power Good Signal part of the boot process. There are no shorts or inadvertent grounds that I can see. AMD motherboards installed in the same case and wiring harnesses work fine. Changing the power supply makes no difference, and both power supplies work perfectly with other mobo/CPU combos, albeit AMD systems. These are not cheapie came with the case power supplies but Cooler Masters of more than sufficient wattage for the minimal components installed to this point. To the best of my not unlimited knowledge AMD and Intel processors work the same with regard to a Power Good signal. The Asus mobo has an LED that lights up signalling the mobo is getting power. Unfortunately I do not have another motherboard to trial the CPU and vice versa (but I have several AMD systems, hand assembled with no hiccoughs ever). I have already arranged to exchange the CPU but could it be the motherboard?