Zalman ZM600-HP is a 600 W power supply featuring a big 120-mm fan, an internal heatsink with a heat-pipe and modular cabling system. This unit is internally identical to OCZ GameXstream 700 W (the only difference between the two is the use of a heatsink with a heat-pipe and a modular cabling system on Zalman's model. Let's take an in-depth look on this power supply and see if it can really deliver 600 W or even 700 W.