If your setting the settings for games so that your FPS is not very high (45-35) then the game will at different points that require more power go down. You see this in every benchmark the Avg FPS may be 80 but the low FPS may be 40. So if your avg is 45 the low may be 20 or 10. In that case just adjust the setting to a lower level. If this is not whats happening then let me know.