I was experiencing fluctuations in fps in league of legends, anywhere from 30-60, I knew something was wrong because my setup was more than adequate to play this game at a steady 60fps on high. I tried everything, until I decided to add another hard drive in and run league of legends off that. Upon playing league on the new hard drive (500GB SATA 5400rpm) my fps has been steady at 60, so this begs the questions, can a hard drive really cause low fps, and fluctuations in fps?