I made a couple of videos/benchmarks out of boredom at work showing performance on this game on a GTX 960, and on a GTX 980 (NOTEBOOK). I hope they get to help a couple people out, specially because the 960 with 2 GBs struggles while the 4GB does not.
GTX 960 Ultra 1080p:
https://www.youtube.com/watch?v=MckPbSKfQu8
GTX 960 High 1080p:
https://www.youtube.com/watch?v=Ldjb6PjAb64
GTX 960 High QHD 1440p:
https://www.youtube.com/watch?v=WDXA95CSIhI
GTX 980 (NOTEBOOK/Non-M) Ultra QHD/1440p:
https://www.youtube.com/watch?v=r7sbxiAEkC4
Last one is just for fun basically.
Hey, at work I have laptops with the same specs, I'll TRY and convince the bosses to get Doom on these laptops as well and come back to you, but it would take me 3-4 days, the internet sucks here. I've been working and testing games on a desktop with a reference 960 (2GB), and to get 60fps or 50-60fps I gotta run it on Medium. The 960M is slower than a desktop 960, so that will probably help you. By the way, it will make a HUGE difference if your 960M has 2GB or 4GB, as the game will cap those 2GBs even on High.
I can confirm this as well, and ALL the 3 videos I posted above show this. There's a huge difference between both 960s. Huge. The 2GB even stutters on Ultra at 1080p. It stutters pretty badly.