Would a UPS stop short circuiting and over voltage inside the PC? I thought they only work for power going from the wall to the power supply. I want one in between the power supply and the cathode light system. Not sure if you have seen my other thread but somehow while plugging in an extra cathode (should have done it while the PC is off I know), a surge went back through to the PSU and out through the GPU power cables, into my first GTX 580 and down through the SLI bridge and into the second 580 taking out both cards. Unless I can find a fail safe way of running the lighting, I will be throwing them away.