"This Cooler is no small product... It takes up virtually all the space about all of your motherboard area - so, you must make sure you have a reasonable size case! The Sunon fans draw 2.4 Watts of power each, so even a 200W power supply should be able to handle these. The 35.5 Dba noise level is reasonably quiet too, you can hear the fans - but they don't distract you. With a lower power consumption and low noise, you'd expect a rubbish CFM from this cooler - but, 138 CFM is pretty amazing! That's more than any good HSF can do!"