Originally Posted by thrasherht
Not trying to argue the point, but how was it the fact that it was a single rail PSU result in it doing this? Could it have not just been the protection failed? Or do all PSU's with a single rail have this protection removed? I mean I have strong confidence that my single railed 650watt PSU is not going to have an issue. But you have to ask, was the PSU being a single rail souly to blame for this failure, or maybe a combined effort of different things that made this happen.
My other question is, why in the world did he need a 1600watt PSU. What was he running to need that much power? Wouldn't having a PSU that is too high of wattage also cause the PSU to be able to put out way more current then is needed to fry everything. I mean his PSU could have spiked into the 2000watt range before dying, while my PSU if put under that situation probably wouldn't manage to put out more then 1000watts before killing itself. So would having too much wattage also be helping the PSU kill itself worse?
It's a confirmed fact that the Ultra X4 1600W has no +12V OCP. Even just looking at the internals, it doesn't have the massive shunt resistor a 120A+ OCP circuit would need.
And your TX650 is indeed vulnerable to this issue. It's a quality power supply; but it lacks +12V OCP. Many otherwise quality PSUs do.
And yes, his PSU was way overkill. But even if it had been an 850W the damage still would have been catastrophic. It just would have been a slower fire. A 60A short vs. a 100A short, 60A is still devastating.