I have had below average performance in GTA V for a while, and the only thing people tell me is that I need a new CPU. While this is true, I think there is a different problem. While playing GTA V, all is well for about 40 minutes. But then, everything goes haywire. Huge, frequent lagspikes, rendering the game unplayable. Naturally, when this happens, I open task manager. 100% disk usage. Always. CPU usage is high as well, but never 100% when the game basically dies. Does this mean my Hard Drive is causing issues?