Hi there, newbie here. Also new to photography. (Canon XTi). I was so impressed with the images off this camera, I went out and bought it. Images look great. (new computer too). Now I swapped out the stock video card and installed a 512Mb BFG Graphics card 8600. Awesome card for gaming. Problem is, now my images look like crap. they're all grainy and washed out. Settings are at the max as far as color and resolution. If I connect with my old computer, they look great so I know it's not the camera. Any suggestions?