I have one on my 2100+ and am very happy with it. I'm using the temperature sensor mode of the fan, it's got a nice lead which goes under the processor (between it and the socket, the wires are thin enough to fit between the pins). It can get quite noisy when the CPU temp rises (playing games, encoding, etc). Thermaltake's specs say it gets up to 48dba at full speed. As for temperatures, my CPU idles at about 51C, and peaks at 56. I will make one suggestion however...and that is to take off the metal TT logo grill on the fan. It's only there to look good, but it generates extra noise.