SilverStone have updated their NightJar series with a new model, the ST50NF, which is a 500W PSU that relies on passive cooling and so operates in complete silence.  With a claimed 80 Plus Silver rating this PSU is perfect for mid-range systems and servers, which you either need to operate silently or to use in dirty environments where fans can bring in enough dirt to cause shorts.  The design challenges that SilverStone faced when developing this PSU is obvious in its $200 price tag, which may discourage some.  [H]ard|OCP takes a good look at the newest NightJar from SilverStone here.

"SilverStone is back on our test bench today with a fully silent and fanless 500 watt computer power supply that is making some very impressive "Silver" efficiency claims. Beyond that, terms like "noiseless," "dusty environments," and "mission-critical" are thrown around. Now to figure out what a "Nightjar" is."

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