Is there any test or program I can run to see if my graphics card is working at its best. I've been noticing some weird problems and I want to rule out graphics card, I can't test it on another system.
Someone might correct me, but for 3dmark06 and a 7900GT, your scores look fine. I had an x1800XT which is just a bit slower, and a 3500+ and scored just a hair slower then 4000. You've got just north of 5K with a better CPU, so I'd say all is well. With the E6600 you could go up in GPU power, so you might want to look for a better video card.