I've been using an Antec Kuhler 620 but I started hearing some noise from it tonight. I thought at first a fan was going out so I shut down and cleaned the fans out. But after powering back up I immediately got an overheating error. I shut back down and cleaned the old thermal paste off and reapplied it. The temps stayed down for a few minutes but built back up quickly and I could still hear some noise. Looking it up it sounds like the pump failed, I am just hoping that the proc is still okay. I have an Asus Sabertooth P67 mobo and was hoping I could get some recommendations for a replacement. Nothing is overclocked currently so I don't know that I need to replace it with a similar cooler. I wish I still had the original cooler to test with.