Hey guys i have a pc that seams unreal! Thing is i have this pc with a Core 2 Duo Ati 4870 1gb and Tpower I45 so the gpu and mobo clearly indicate that a 500 watt psu is required to operate but read on best part coming up- there is some chieftec 450 watt psu installed and im sitting here wondering how this machine is working not to mention playing crysis on very high (im not showing off just giving an example)