Can't help you out on the Thermalright, but I don't see why it wouldn't fit. I have the 8045 on a K7S5A board right now and it fits fine. It depends on which revision board you have though. I've heard that the later revisions of the board put the capacitors closer to to cpu, so you might have a problem.On a sidenote: Does the PAL 8045 fit the K7S5A?