Computer enthusiast insiders know that the choice of your power supply is paramount in system design but POS (Point of Sale) computer buyers usually just take the included PSU without thinking about upgrading later on. Off the shelf computers often use under powered power supply and chances are you got a 430W power supply that weighs about 1.5 pounds and the heat sinks are the size of ?Overheat and die quickly after the warranty is up?. We?ve been working on desktops since the Tandy build your own computer days when you got a PCB components and a soldering iron and power supplies have made leaps and bounds and should be one of the most carefully chosen components.