Re:SilenX (Score 2, Informative)

SilenX doesn't perform as advertised for most people. Add in their high cost and extremely deceptive dB ratings, I'd avoid them like the plague. No 120mm fan hits 14dba unless it's been heavily undervolted. Nexus fans are considered the gold standard for silent cooling and they operate at 22 dB. Personally, I'd suggest buying any branded PSU (preferably Antec) that operates off a 120mm fan. Run it for a while and see how it goes for you. If it's too loud, replace the existing fan with a Nexus/Yate Loon. If it's too loud still, undervolt to 5v or 7v and it'll be completely inaudible at just a few feet away. If the nexus fans are too pricey, look around for Yate Loon 120mm fans. They manufacture for Nexus and typically sell for half as much and offer the same build quality if you can find them.