Game Crashing *5680x1080*
The two latest drivers from NVIDIA are rushed and very buggy, apparently they wanted to optimize for GTA. GW2 is not the only game that has issues with those drivers.
Don’t use 350.12 and 347.88, revert to 347.52 (clean install).
Game Security Lead
^This is sound advice. There seems to be a voltage issue surrounding the current NVIDIA drivers, causing cards to become undervolted in SLI config when under heavy loads. This will cause your cards to reset, which in turn crashes the NVIDIA drivers, the game that was running, and most likely require a restart.
The problem most likely resides in an unclean driver install when you attempted to revert back.
Try a truely clean install – I recommend Guru3D’s Display Driver Uninstaller –
http://www.guru3d.com/files-details/display-driver-uninstaller-download.html
Clean up your drivers and try 347.88 again
http://www.geforce.com/drivers/results/83080