the situation occurs at any random time, it crashed once when I was browsing the web, another time when I was skyping, but never when I was playing games or any other intensive task. And yes, I did install 2 new graphics drivers, including the 320.00 nvidia beta drivers, but it started crashing before that. I have windows 8 and i do overclock occasionally to around +135mhz on the gpu and +350mhz on the memory. Don't know if that accounts to the issue. And it happens when the computer has been on for a while. (3 - 4 hours)
Asus G46VW
i7 3630QM | 750GB Hard Drive | 1080p Full HD Display | Corsair Vengeance 16GB | GTX 660m | Windows 7 Ultimate