Aaand scratch all I wrote below. Because I'm now logged in to post, I can see your sig.
And you have a 144hz monitor. I assumed you wouldn't have when listing mmos.
Yeah, a 2500K isnt going to hit that in those games.
At a pure guess, a 1070 might hit 144 (those games aren't out yet?), but would indeed get pulled back by the CPU. So anything 980/1060+ might get 'bottle necked'?
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my i5 2500k 4.4ghz
mmos like bless online, lost ark and maybe ashes of creation
In raids/busy areas you might need to turn down a few cpu specific settings to maintain 60fps.
However its not so bad, that its likely to be your main concern.
1080p is not really good enough to manage MMO interfaces imo. So you want a 1440p+ monitor. And then its all about the monitor resolution 'bottle necking' the graphics card. The CPU doesn't care about the res for the most part.
My 4.4ghz 3570K wont reliably maintain 60fps these days with everything maxed on the latest games. But it doesn't need much turning down off ultra to get it back up again.
The main problem it has is lack of threads if I'm trying to run stuff on a 2nd monitor, and you can forget trying to record stuff.