I have a hercules 3d prophet II gts pro 64MB DDR, the one with pretty blue ramsinks and a relatively nice gpu sink. I have a blowhole over my CPU HSF that helps a little with cooling the gts also. I get 230/485 easily with no artifacts, and have gone as high as 240/495 with a few quirks. I'm looking into watercooling, when I do I'll probably watercool the gpu as well, hopefully I can manage to crank out around 250/500 eventually. Oh, I've also modded mine into a quadro, and removed the EMI filter.
3C2X1(<b><i>Genius</i></b>).
Even though I'm a newbie, at least my average post is intelligent!