I have a GTX 260, i have seen players with 700's models crashing, and others not
i also have a friend on a laptop that has a 200 series but does not crash as often as i do, i will ask him as i see him and update the information(Edit: he has a Nvidia GTS 450)
Specs:
Windows 7 Home Premium Service pack 1 64 Bits
Intel Core I7 860 @ 2.80Ghz
Ram 6GB
Nvidia GTX 260