Nexus NX-9003 350W Hybrid PSU
 

Nexus, whose "Real Silent" fans have the right combination of low noise and wide distribution to make them a favorite among SPCR enthusiasts, has released a "hybrid" power supply called the NX-9003 SFB. The PSU's cooling fan is designed to stay off most of the time, kicking in only when absolutely needed to cool things down to safe levels.

Hybrid power supplies are a bit of an oddity. They are a cross between silent, expensive fanless designs and high power, noisy fanned designs. But really, the only difference a fanned and a fanless power supply is the cooling system.