It can be incredibly deflating to unbox your shiny new (or pre-owned) GPU, plug it in, install all the drivers, and fire a game up only to be disappointed by the level of performance. You even did the requisite research on the best GPU for your system. Perhaps there was a smudge on your glasses when you were reading those benchmark charts, but if you’re sure you should be seeing more performance, it’s likely to be one of these 4 issues.