Lol, I know I proper failed at testing them games.
I will play it today for ya, I wanna give the game a go anyway and haven't been back to it.
So 4k, ultra vsync off yeah. Any particular AA you want on or any game breaking settings you want off?
Cheers mate! I would say keep vsync off and try 5K through DSR but 4K is fine too. I would also drop volumetrics to medium. AA it's all the same performance wise.
If you have stutter then supposedly a driver update messed it up, from steam forums:
I've had the same issue (1070ti as well), lots of stuttering. I found the fix on another post via google. Basically in task manager i set the surge2 exe priority to high and disabled core 0. Works great now.