My graphics card (high performace one) seems to be performing worse. Before while playing this game it would not lag much and would run hot. Now it lags more and runs cooler. I switched to the lower performance one and it seems to perform better than the high performace one. THis seems to have started after I did some GPU tests. I left the GPU test running for a while. When I came back the display was stuck in sleep and I had to terminate (force shut down) my MBP. Previous GPU tests got a little stuck in display sleep but got out after a bit. Did this GPU test(s) damage my GPU? 