I have a GTX 550Ti graphics card, 750 watts of power. I know it's not top of the line or anything but here is my question. There are times when I run the game and my FPS are just fine like between 55-60 just fine. Other times for what seems to be no reason at all my FPS drop to 30 and stay at 30 and when I move my camra view they will jump back up to 60ish and go back down to 30. Dosent matter if i'm on ultra high good, custom, from time to time the Frame rates will drop to 30 and stay at 30 for no reason at all, other days it's fine and I have no issues at all with my frame rates. Most often I stay in the "Good" range or i'll go to high and custom it a little so it is a little less. Any ideas why for no reason my frame rates will drop to 30 and stay there for no reason at all?