GTX 280 Solid Color Crash!

Hello!
Until about an hour ago, my system was running quite stable. I have a setup with:
EVGA 790i ULTRA Motherboard.
PNY GeForce GTX 280
Razer Barracuda Audio Card
4 GB Patriot 1033MHz DDR3 RAM
1000W ULTRA PSU

I realize the PSU isn't good and I'm planning on replacing it, but the system was working decently until about two hours ago.

I was playing Modern Warfare 2 and my computer crashed with a looping sound, which usually meant that my Graphics Card was overheating (I think). Then I rebooted by holding down the power button, and then I tried to change my cooling percentage in the Nvidia Control Panel. After that, I started up MW2 again and I was getting around 30FPS when I usually get a solid number around 60. I didn't change any settings.

I then thought maybe my slight overclock was reset to stock, and I went to change it back and rebooted, but it was still doing it. I got a bit frustrated and set all the sliders to max (maybe not such a good idea) and then rebooted, and now everytime I log in, it crashes, with a solid color that either appears to be black or a dark blue (slightly different every time).

I tried removing the card, reinstalling it, running in Safe Mode (no crash there), and cleaning the dust, and everything else, but I just can't get it to work!

I want to play again! How should I fix this problem?