Hey Crashguy, can you tells us more about the distinctions between paste and putty? I've almost got it but I think I need a little help here. I really see it more as a 'film' than putty considering that it can't be moved or impressed upon. Even less water than putty!
Actually, according to Intel, it's "thermal interface material ." Got that?
I'm just going to call it the gray stuff on the back of the fan. That was easy...