I just went through the trouble of replacing the stock Corsair H55 fan with an SP120 and remounting the pump with AS5, but temperatures have not changed a bit. Hell, they've gone up. Ambient hovers around 28ºC, CPU idles at 36ºC, goes to around 85ºC after two minutes of prime95. I also noticed that the pump/heatsink of the H55 gets rather warm, but the rad stays cool no matter what. I think the pump may be having some troubles, either that or I didn't apply the AS5 correctly. (Took me about 6 tries to get it on)