I recently bought a Vibox PC then I found I couldn't play any games, coz the FX series don't have Integrated, so I looked into GPUs and settled on a Gigabyte HD7750 OC AMD/ATI Graphics Card - 2GB or a ScanFX Radeon HD 7750 AMD Graphics Card - 1GB and I have looked around to try and find if I need a larger power supply than the 450w already included. Please can someone tell me if I need a larger PSU, thanks for the help.