I put a Vantec Tornado on my heatsink about a week ago (in replace of a broken Panaflo), and it took the CPU temp down a couple of degrees, plus it's not even running full blast (my PSU regulates fan speeds). So far, the highest speed it has gone is only around 3500RPM, so I haven't heard it yet, but this definately one powerful fan with room to get some more air flow if needed.