Did the sys requirements get bumped up all the sudden?
My trusty 1060 seems less able to maintain 60 fps over the last few patches - it's more like 30+ now
Though the fact that I only have eight gigs of RAM probably doens't help,
system ram that is. With the original pre-patch one release frame rates varied wildly but it was able to maintain 60 fps in outdoor environments on the high pre-set.
I'm running on a Core i5 6400 quad-core processor.