Underclocking a video card?

Q: My PC's been going through lots of overheating problems. Sometimes, even in desktop, i get a few coloured dots that show up. In intensive games, like crysis i get loads of these, but they are dots and barely visible. I heard that underclocking my video card can help lower temperatures. If i do this, i know it lowers performance, but does that mean that i can't play games that i could before? how far can i underclock my graphics card without losing too much performance, aswell as cooling it down? nVidia GeForce 7900GS Latest drivers 256 MB memory Core Clock 450 MHz Memory Clock 660 MHz

A: Just so the asker knows, I recommend you do not follow the advice of the person directly above me. The 8600 GT is garbage, and performs far worse than the 7900GS you currently have.

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