This is a great fan IMHO for those who prefer quiet cases. I actually have one mounted on my heatsink (Thermalright AX-7) for cooling the CPU. I do not OC my CPU (Athlon 2200), and my temps are always below 40 C on the proc, and below 35 ambient in the case. I would not suggest it to someone who is OC'ing their machine, as it does not move as much air as some of the louder fans.