So i just built a brand new computer, and when i play games my 12 volt rail drops to just above 10 volts. Its a Diablo 550W PSU. Could this be caused by having certain things using the same power line? I have my Graphics card and harddrive hooked up on one line and my CD and DVD drive on the other along with some fans. Should i ditch this supply and look into an Antec? Any input is greatly appreciated.