I have my GTX470 currently OC'ed to Core: 770, Mem: 1700 and fan at 85%. Furmark stress test makes my temps go up to about 83 deg, where as folding for 10hrs straight, or Artifact scan in ATI Tool never causes it to get any hotter than 70 degrees. If I push my clocks any further, I lose display within 10min of Furmark (possibly due to lack of voltage despite having it at 1.087V which is the max), however, the card is still stable with ATI Tool and Folding. Makes me wonder if Furmark is overkill. If the GPU is fine with ATI Tool, Folding, games, 3D Mark Vantage etc., but not with Furmark, is that recommended, or should I ensure my card is Furmark stable?