I'm using the above PSU, it's running a Core i5 setup. Calculated my peak wattage is around 375w. Normal working under 200w. My PC is used mainly for work, and it's on for 12+ hours a day every day, gets a hard life. I like to keep hardware 3+ years, then do a big jump so components get used. I'm half in a mind to get a very high quality PSU. Was thinking Corsair HX 850, I wanted the 90% efficiency if I was spending money. Whats peoples views? Am I being paronoid (maybe) about the OCZ 600w, or should I spend £130 on the Corsair?