The exact card i have is:
XFX 8600GT Fatal1ty silent OC
Stock clocks:
Core 620, Shader 1355 and mem 850/1700
New Clocks:
Core 700, Shader 1465 and mem 960/1920
The card is fitted with 256mb samsung ddr3
temp now at idle is 32c and i can'g get any game i own to get it past 46c now with Zalman VF-1000 cooler at full fan speed.
it is not normal room temp in here though, it is cold lol (well not uncomfortably cold.
Stay Cool