ya i have the 6800gt oc. It is very quiet to me, but then again my heatsink fan is kinda loud, and I really dont care for a quiet pc. As far as cooling efficiency, I had to stick a 80mm fan on top fo my sound card which is underneath the video card, that brought temps down to an idle 62-63*C, I havent seen it heat up past 78*c, even before I put the fan underneath it.I hear people saying the bfg's with the picture on the heatsink(a mermaid or something) have much better cooling.