Quote Originally Posted by Vapor View Post
That forumula is for coolant (well, water) temperature differences immediately before and after the heatsource. Not a sustained load coolant temp. If that were true, radiators would be useless.

Considering the 8800GTX pulls ~150W (being nice) when OC'd and the core uses at most 110W of that (closer to 100W if I had to guess), that's another 40-50W of heat, and on a 120x2 radiator that's already stressed, that easily leads to the few C increase for coolant temps for the whole loop (witnessed in both GPU and CPU temps).
Yes, but I'm sure there are other components that use some energy as well. You've seen the fullcover blocks' base designs right? The water doesn't flow over some components, so the thermal resistance should be pretty high. If the core runs hotter, then less heat is making it into the loop as well right? That's another thing