im going to keep it very short. specs are gigabyte g1 gtx 970 no overclock, i5 4670k, 8gb 1600 ram, no ssd. on the first showcase mission in singleplayer with no cpu overclock my fps averaged around 54-55 but bounced around between 40-62 and even lower sometimes fairly constantly so with vsync and such it was very studdery, this is at the standard 3.6ghz for my cpu. i overclocked to 4.4ghz and on the same mision doing the exact same things my frames averaged around 75-81 but bounced around between 72-90+ and even 130 if i looked at the ground but never got close to 60 so i was able to enable vsync and it ran like a dream. and in multiplayer on servers that were not complete crap i was able to get roughly about the same framerate and it was smooth as butter. so if you have basic computer smarts i would highly recommend OCing if your having a little fps trouble.
heres a pic of the settings/fps with the overclock, idk if they will work so ill also post gyazo links
[IMG]http://i57.tinypic.com/k1ckut.jpg[/img]
[IMG]http://i61.tinypic.com/oj3s79.jpg[/img]
[IMG]http://i62.tinypic.com/11b6wea.jpg[/img]
http://gyazo.com/bee2c1a3a288a1e9318a334cb5d05edc
http://gyazo.com/41ae10507b583f1e15bb273ee1f9434c
http://gyazo.com/34a656f5ac0a94c226b4d71f87173f81
I'm just saying not everyone can achieve an overclock of that amount.