This is likely a driver problem. Have you installed the latest driver for your GPU?
Drivers for NVidia GPUs can be found here: http://www.nvidia.com/Download/Find.aspx?lang=en-us.
Also, please provide us with system information (CPU, GPU, RAM and OS) if the problem still persists after downloading the most recent driver.
Not sure if it helps, but I was expriencing crashing at the same area. Made sure my drivers were up to date. till got a crash. Lowered the graphics settings to normal: no crashing. WIll experiment more laters.