Doesn't matter what track or what graphics settings I am using. After I am on the track for about 5 minutes the game just starts stuttering like crazy. I can't even play it. It runs butter smooth and then goes haywire? I've tried reading up on fixes and can't find anything that works. I redid the replay file so it was 0kbs in size as to the 2gb file it use to be. That helped a bit. At first the game would crash after 5 minutes and I didn't have stuttering problems. It would just crash. I fixed the crashing and now I have stuttering. This is very annoying since I paid 60 dollars for a stupid game that isn't even playable. I am getting so sick of DEV's releasing games that aren't playable. Really wish they would release demos more often.