Hello, I just built a new PC and every time I go to boot it up to get into my BIOS, etc, because I want to install windows. But everytime I boot it up, it only lasts about 30sec, then the time goes down every time I boot it up after that. I don't know what could be causing this, the only thing I could think of would be the processor over heating, but I have a HSF so it shouldn't do that. Anyways, my PC specs are down below, please get back to me with any help, thanks.

Specs:

Broadway case: 500W PSU w/ 2x 80mm fans 1x 120mm fan and airduct.
Pentium 4 3.0GHz socket: LGA775
Albatron PX915P Pro with 800FSB
nVidia XFX GeForce 6600 256MB
1.5 GB of RAM
WD Cavalier 200GB HDD

Thanks.
Auman