After playing the GOTY for about 2-3 hours the frame rate goes wild and I'm not sure what could cause that. My PC is well cooled and it's really clean from inside. My suspicions are memory leak or codec issue. Anyone had this problem? The FPS drop occurs most noticeably in Rivet City and only when I look at certain NPCs. My hardware is more than capable in running this game and I played it with no issues before I reinstall my OS (Win XP). I should also mention that same thing happened to me twice with Skyrim like year ago but mysteriously fixed itself... somehow...