I've installed all parts correctly when building my new computer. The problem is when I turn it on, everything starts up which is good and I see my motherboard screen on the monitor but after a few seconds, the whole comp shuts off. I'm waiting on a new PSU to come in to see if that's the problem but the PSU I have in there now was previously used in my old comp and worked fine just a few hours before I built my new comp. If the PSU isn't the problem, what else could it be? Here are my specs:
Abit An8 Ultra Mobo with Nvdia Nforce ultra chipset
AMD 64 Sock 939 3700 with San Diego
Sapphire ATI Radeon x850xt 256 mb Video Card
3 x 512mb 2700 value select RAM
Seagate 80gb hard drive
Could it be the ATI video card and the nvidia chipset having conflicts? I've been told it should work fine, but I'm wondering now.