Greetings once again, good readers of mine. It's been a rather long time since I last got to test my mettle with a fanless power supply, but after several long months the wait is over. Ladies, gentlemen, aliens, llamas, today I give you the latest from Seasonic in the fanless X series 400 watt unit. This is exactly what you think it is, unless you thought for some inexplicable reason this was a toaster - a version of the original X-650 and X-750 units designed to run from nothing to full power without a fan.You will recall that the more powerful X series units were designed to be semi-fanless from the get go. Seasonic was able to do this by designing an extremely efficient platform that made good use of open space inside the unit. Like its big brothers, this unit is also certified for 80 Plus Gold.