I've been with this problem since half and a month ago, and i been playing this since 4 months, and it will give me serious problems if it keeps like that because when i'm racing online it freezes out just right when the whole bunch of people is taking a corner, and happened couple of times i went straight to them because of this and i will surely get banned someday and not even for my fault
Edit: and sometimes it freezes and recharges all track sources again after giving a message saying "D3D Device error".