OK here are some figures for my current system - 119W idle 300W gaming (Borderlands 2) This is with a hexcore CPU (stock), GTX770 OC, 12GB ram and 3 HDDs. Not bad! I originally bought the 775W PSU with two considerations in mind: overclocking hexcore CPUs on the X58 platform, and SLI, both of which I've done many times over. A quick search of my email account shows that I bought this PSU in Oct 2010, so it's done me almost 4.5 years of daily use (and sometimes abuse) thus far. I'm very impressed and will certainly buy TT again if I ever change my PSU.