I run all games at max settings across at 5760x1080 at 60 frames.  This includes racing sims, MechWarrior Online, Rainbow 6 and others on a stock 780ti reference cooler.  My 4770K has been untouched since installation and has never been overclocked.   I can only imagine the gains on one monitor regardless of resolution and have been considering an ultra widescreen.   But even then, I would not need to overclock my system.  
I guess I will never understand the constant tinkerers mind.  I have been told by members of this forum that my system is inferior, but their superior systems have nothing but problems.
I use Precision for monitoring purposes only.   I update my video drivers with at least two releases in between.  Just a firm believer in not updating things just to do it.