When I first got this computer I was able to play world of warcraft with no issues on at least good graphics settings. Recently when I play I have to play on the lowest settings possible and even then im getting really low frame rates. I have my automatic graphic swapping turned off, is there anything else I can try? What could have changed from when it use to work fine, until now? Also worth mentioning that I am playing on a 27" thunderbolt display.