I have a couple year old rig, a Q6600 quad core and recently I haven't been able to boot up and start. At first I would get some artifacting when i was using the computer and then it would shut down after awhile. Now I get some artifacting in the Bios (3-4 distinct lines, and then more in the windows logo. After the windows logo loads up the computer does not boot into the OS it just stays at a black screen now.
At first I thought the computer must be overheating so I took the rig apart, cleaned up all the dust, reapplied good quality thermal paste on the cpu and i still had the problem. Then i thought the artifacting could be because the GPU was overheating so i opened it up and reapplied thermal paste on the gpu aswell (its a Asus 8800 GTS i believe). This also did not yeild any results. Finally i replaced my PSU to a new 500W cooler master PSU and still the computer won't boot up.
I've tried trouble shooting in every way that I know off. Please help
Q6600 stock speed
Asus P5B premium motherboard
4GB of ram (4x1GB modules)
Asus 8800GTS 320mb
cooler master centurion case
Asus dvd drive