I have a P3 600E@800.
With a stock fan and thermal grease I ran SETI(no graphics is more processor intensive) at 65C.
I switched to a Gorb and artic silver from 2cooltek and am now running SETI at 55C.
This is pretty good for now.
When the ArtiCooler comes out, I will try that.
Also, I am going to put a HS on the clock chip for my Asus P3V4X.
Before, I could not OC much past 810. But with my friends GlobalWin I had gotten up to 830. Time to see what is possible now.
Then on to cooling my GeForce.