here's a temporary fix for fan speed on the new HD4800 series:
http://www.xtremesystems.org/forums/...d.php?t=192932
it also works for the HD3800 series.
so far, my idle dropped to 58C and load to 64C. that's with 35% fan speed. i found 65% to be too loud.
temporary fan speed fix for HD4850/4870
moriz