I took parts parts from two different computers and put them into one to make a single, better computer. For a while this worked fine, but recently, when I go to turn on my computer, it conks out after a couple of seconds. I went about unplugging individual pieces and restarting to see if the problem occured again and, as I suspected, the evidence points to my GPU. I read somewhere that it's the initial "power request" at startup that makes the PSU think it can't supply enough power and auto shuts down. That's just what I've read. I'm pretty sure the card is fine (because there's no reason--I can think of--that it wouldn't be, seeing as how it just up and decided to keep my computer asleep out of nowhere). Am I right and/or how do I fix this?