Thanks all....looks like the 7800 is vastly better engineered to run cooler than the 6800gt. Do they have monsterous noisey fans? My 6800gt fan is not noticible but probably because I have three case fans running + the heat sink and PSU. I did notice something. After kicking up my stock 6800gt from 350/1000 to 400/1100 my 3dmark5 went from 4969 to 5090. that is less than 1/2 0f 1% performance increase. What does that slightly higher score actually mean? Does the increased heat warrent the slight increase of 3dmark5????