Re: Electrified TOWER!
Well it's unlikely that a Corsair power supply would be shorting out to it's own case, but stranger things have happened.
I would check all the case fan wires and make sure none of them are pinched against the case.
If you installed a stand-off in the wrong place on the motherboard tray it could be grounding the system, but normally the computer wouldn't start.
Did you run any wires under the motherboard? Some motherboards have sharp points (solder points) that could penetrate the wire insulation.
It could be something like a faulty optical drive that's shorting out when it's accessed but not when it's idle.