Well I seem to have fixed it. The computer would no longer POST so I started unplugging stuff. Turns out unpluging my Rosewell USB keyboard let it boot fine. I plugged it into a different USB port and it seems to be working ok for now. I also underclocked my old 7600GS to 300/300 from 400/400. I don't need all that power just to run the apps I do for now. Just played Minecraft multiplayer for about an hour with no issues!
Thanks for the advice, always helps bouncing ideas off people.