Seasonic X-Series: X-400FL Silent Power Supply Review, HardOCP. Zvijerčica
"The overall build quality of the Seasonic X-400FL is simply excellent across the board.....The results for the normal load testing with the Seasonic X-400FL at 120v and 100v were outstanding. I mean simply outstanding.................The Seasonic X-400FL passed the DC Output Quality tests today. Ok, it didn't just pass the tests, it excelled in those tests. Ok, perhaps excelled is an understatement. Maybe it would be more accurate to say that it ran circles around the tests like a little child taunting a playmate........The Seasonic X-400FL is fanless, which, unsurprisingly, made this unit silent. I am sure it would make some noise if you dropped it on the floor though."
.