Be Quiet's SFX L PSUs are small and quiet as a mouse
 

We usually think of smaller things being quieter (well, maybe not if you have kids), but smaller fans turn into buzzing monsters when they try to do the work of their bigger siblings. That can make building a small-form-factor PC to connect to the living room or bedroom television a tough project. Be Quiet's new SFX L power supplies look to ensure that building a compact PC doesn't mean you're building a giant mosquito in the process.

http://techreport.com/news/32473/be-...iet-as-a-mouse