My computer seems to lag when I try to play these games in the higher resolutions only. When I lower the resolution it does not lag as much. I think when my parents bought my computer, they didn't buy a very good graphics card, I checked and I think it is the AMD Athlon II X4 635 Processor. Would getting a better graphics card fix the lag issues? What would be an okay graphics card to run games without lag? Not too expensive as well, thanks!