Dc7800

I Have an HP Compaq DC7800 Compatible Minitower with an Intel Core 2 Duo E8400 Installed, I was Planing on Upgrading it to Core 2 Quad Q9650 for better performance, here are my PC Specs: Mobo: HP 0aach (Intel q35 Chipset) Ram: 8GB DDR2 Ram @ 800Mhz Graphics Card: Nvidia Geforce 8400gs PSU: 365W...

First time building a computer worked fine for a week. Then it wouldn't start up. Changed out motherboard and PSU still having problems. Now it starts up but restarts within 1min. So I have a very expensive brick and i dont know what is wrong. TR2 600w GA- 970a-ud3p FX6300 GTX 550ti The only...