Originally Posted by txa1265
I took one piece of advice and turned HDR completely off, and after wasting an hour screwing around with crashing and reloading I got an hour of actual gameplay …

HDR seems to be the problem. I moved setting down to medium and turned off HDR and all is well - game is rock stable. It is a sham, given that the game is getting poor reviews in part due to the technical problems. It is great fun!