I've got an infinity and the core's are all idling sub 40 @ 3.2ghz. My room is like a sauna also. I think the mounting of the scythes is the key thing. The intel push pins suck, I'm looking to mod it in this kind of fashion:
With a backplate and some bolts I think results will be much better and the mount much more dependable. I think mine comes lose in transit (car to uni and back etc) which is a pain.
Hope thats some help mate!