The PSU struggled to run a fairly medium to low spec PC setup. GTX 650, FX-4100, 2 x 4gb Ram, 1 x SATA HD and 1 x SATA DVD/RW. The entire system should be drawing around 305 watts at its peak yet the PSU would overheat at this level leaving the smell of burning plastic permeating around the room. It is also quite a noisy PSU despite it's lack of power. The Wattage rating of the PSU based on the Amps carried on the 12v rails would be more in common with a 400-450watt PSU and certainly not a 600w. Avoid like the plague if you are planning on running a PCI-E Video Card or 125w processor.