So I wanted to upgrade my dell optiplex 790. So I bought a gtx 750 ti and 8gb ram. All was good at first. Everything went well and worked well in general. But one day I suspended it and when I turned it on, it gave me the error (video scheduler internal error) so I reinstalled windows. And it worked, but after about 10 minutes the screen flickered and the computer shuted down giving me the same error as before. I've tried it several times but I always end up with the same result. Hope i can find any solutions here