Silence defines the X-400 and the X-460 power supplies. Taking advantage of the benefits derived from the 80PLUS GOLD level of efficiency and the use of high-grade components, these power supplies run cool and run silent, perfect for your Home Theater PC (HTPC) and other applications where "silence is golden".

Silent PC Review
"The Seasonic X-400 Fanless is a superb power supply. It's more than just an X-series PSU without a fan. It stands on its own as a product carefully engineered to serve its function, and it deserves our highest recommendation." Full review