I put an accelero on my card and never hit higher than 57C at full load.
Well yeah but that's one monster cooling solution. My 5970 has one of them..came stock. At full load the card sits at 68 C, and that's with the fan at only 36%!!! If I crank up the fan to 60 it lowers the temps to the 60 - 61 range for both cores...