To developers, ue 4.14 crashes! - Error: 0x887A0006 - 'HUNG'

I tried changing the GPU Stats console command, but it did not prevent the graphics driver crash i have been getting on my GTX 570, Win 7, 16 gigs, 8 core i7, UE4.14.1.

Repro Steps:

ConsoleVariables:
[Startup]
r.gpustatsenabled 0

Make a New Project > Blueprint Vehicle Template >
Desktop/Console > Maximum Quality > No Starter Content

open Sedan_SkelMesh
change the material in a few material slots
after changing 2 or 3 material slots, the graphics drivers will crash pretty consistently

Fatal error:
D3D11Util.cpp Line 176
D3D device being lost
Error Ox887A0006 - ‘HUNG’