If you went with Intel, do not even consider a Prescott type of CPU. Stay with a Northwood (478 pin) and you will not have the thermal issues.
Northwood is faster, clock for clock, than the Prescott anyways and you would not be stuck with using slower DDR2 ram as well, which also runs much hotter than DDR1 ram.
Just FYI.
Yep Hajo, it was an expensive card, but I figure it will last a few years without much problem. I usually do not go with these high end cards, but I knew this would be my last computer for serveral years, as Intel has lost its way.