I've just installed a 120mm fan and adapter to my tower (my tower is about 3mm to small but thanks to a little pressure to the cover it's now fitted) to get it a little quieter and boy has it made a difference. But as an added bonus the adapter I got also contained a 60mm to 80mm adapter which I've used on my heatsink to make that run quieter so that now it's so quiet I can hear the Intel Hamsters farting. It's great.