I recently bought a custom-built PC based on an HPM9265 board sporting both processors running at 2.4Ghz. The PSU seems to have gone faulty and I would value advice on a replacement. The box has a fairly beefy video card, 2 HDDs and 2 DVDs. This is all installed in a CoolerMaster CyberPower case with 4 cooling fans. The failed PSU is a Corsair TX650W, but I've seen a good price for a 400W Fortron PSU - is this likely to be beefy enough? Thanks