I never had this problem. I am on iCafe 340.72 now but keep crashing out in Heaven 4.0. Even OCCT GPU test gives me problems now. (It just stops and goes back to the menu). Those crashes in Heaven ALSO happen without overclock (MSI afterburner) which I had otherwise running stable for more than a year. It's a GTX 660 TI on Win8.1 Anyone else experiencing those problems? PS: It's also no heat issue since I just yesterday cleaned the heatsink and applied a new layer of MX4, temps are good, sometimes Heaven craps out when the card is still in the mid 60s.