finallyyyyyyy the solution is here for directx error and desktop crash for dragon age inquisition:
go to nvidia control panel, manage 3d settings, program settings, select dragon age inquisiton, and set for it: maximum pre-rendered frames: 1, multi-display/mixed-gpu acceleration: single display performance mode, power management mode: prefer maximum performance, vertical sync to adaptive, save, run the game , in game setting set full screen and uncheck vsync, now no more crash. Note that you must set in the game full screen mode and not window full screen, regards
