The X3 is about the size of a standard optical drive and has a black front bezel with a clear plastic cover. The cover lights up in blue once you power on your PC. Behind the bezel are two 40mm fans that cool the innards of the PSU. This means there's a certain amount of noise and this will be facing you if you sit your system on a desk. That said, if you've got a CrossFire X1900 pairing in your PC, it's likely that the graphics cards will be noisier than the X3 and drench any noise from it when you're playing games.



Link: Thje Register