I didn't say it is not a thing, I am saying that I don't buy that it is the problem in this situation; we are talking about a game from 2014 running on a Titan XP at 1080p. If it truly was a poorly implemented render option, then issues would be far more prevalent and well documented and likely patched by now.
OP has an older system, so it makes more sense that over time it has collected software or background processes that may be causing issues than it does to say his Titan XP can't max the settings in a 2014 title at 1080p.
If I'm wrong then so be it, I'll learn something and own it, but don't be so quick to downplay it as an option.