A lot of guys are usign the bolt through for the heatsinks on it, just like the days of old
Some remove the "thermal tape" that looks like a piece of rubber on the mosfets, others like the idea of "coushin" (sp?)
I was not having temp problems so I left it alone just "painted" a little AS 5 on the very center of each fet very very carefully. Little more liberal on the chipset and south bridge though.
The speed control chip (I forget the technical name.. PLL comes to mind, but its also called something else...) seems to be pretty common at runnig hot... so I sinked it without even checking to see if it needed it
I just removed the bottom card. The HIS card with Battle Axe cooler clocks so much better tha nthe sapphire, I am punishing my self by running the two together. (although I did play around with differnet clock speeds I did not notice much of a differnce).
Temps are pretty good so next step is replacing those 92mm fans with a high pressure 120mm and volt modding it