I am experiencing the same issue as Pulsey - repeated complete system freezes. I have a new nVidia GTX780 (runs at 79 dec C during gameplay) and a fresh install of drivers and the game. I'd attach logs but apparently I can't upload .zip
NAS-13729
Edit: can confirm that this was caused by a hardware issue. Swapped out my gfx card for an older one and it's working fine.