Graphics Card Compability

I would say be careful. PCI-Express 2.1 cards had some weird compatibility issues with 1.0 slots at the time of socket 775. Also if you wouldn't mind could to take your side panel off and take a look at your power supply. I would like to know what you have.

Power Supply

Watts:
12V AMPS
12v1:
12v2 (if you have it):