First, we will have a look at specifications:



At time of writing there isn't a whole lot of literature detailing the X4 series from Ultra, however we do have a few bits taken from the box. Output is fairly typical of an 850W power supply, this in particular has a total of 720W dedicated to a single 12V rail and an additional 170W combined output between the 5V and 3.3V rails.



In terms of features, we have Ultras excellent implementation of their modular cable system which is among the best we have seen. The X4, like the X3 is cooled by a single large 135mm fan in order to keep the unit cool, and keep the system quiet.



The sheer amount of cables and connectors this unit comes packed with is enough to get any reviewer giddy. In all honesty, I can hardly think of a situation where so many connectors will be needed, but the different combination of cables, and number of connectors per lead is essentially the idea behind modular connectors: plug in what you need.