I'm working on a water-cooled dual opteron, dual gpu system. I am a little worried about the amount of heat the pump might put into the system (I am thinking of using a Gormann-Rupp pump). I was toying with the idea of putting the radiator inline directly after the outlet on the pump rather than before the reservoir so that the coolant can be returned to a temp as close to ambient as possible without being reheated by the pump. Anyone have any experience with this? Would this provide any advantages/disadvantages?