Bought to replace the original fan with a amd phenom X4 965 noisy as can be, in a case antec three hundred .. Mounting a little cotton because the patterns of form are not at the top, but it's OK anyway, that's what cost him his fifth star. Thermal paste and provided good quality fastenings / mounting plate.
A 1600tr / min is already a happiness of silence, then 600 ... Ultra quiet, and I'm picky! For temperatures, my cpu does not exceed 32 small charge (Office ...) to 600tr / min, no high-use tests.
I therefore recommend attention to dimensions. It is pretty awesome!