I have had a similar issue with a gtx 460 & 560Ti.
The 460 died and went for warranty(gainward). The 560 (Gigabyte) was a driver issue.
Also, clean the card out. Take off everything removeable. Use a cotton or ear bud for cleaning out small areas. DO NOT use forced air. If need to wet the card i.e. stubborn dust, go to your local pharmacist/chemist and get some isopropyl alcohol (don't drink it). Then dip the ear buds and wipe.
On another note, some games have issues with latest drivers, try a previous driver version.
Hope this helps