This one is hard to explain but I upgraded my GPU a long time ago, really shitty entry level card, AMD Diamond HD 6450. It was awful but I was young and wanted to play Skyrim and it was the best I could do. It consistently gave me problems but what always spooked me is that I would get a vertical screen crash sometimes while playing Skyrim to the point that it gave me PTSD for a long time. It would always happen in certain spots, like that waterfall cave part of Bleak Falls Barrow or while fighting the dragon at Whiterun. Even today if I was going to replay that game I'm afraid of that same crash happening and those spooky vertical lines appearing.

>mfw trying to figure out how I even have a job