I'm picking up a new GPU to replace my old geforce 660. Primarily I play WoW, Destiny 2 (When its out), Star Citizen (When it comes out), D3, HotS. Nothing fancy, 60hz monitors, 1080p. I won't be upgrading to 1440p or 120/144hz any time soon I'm fairly certain. Running a 3570K @ 4.6ghz.
Is 6gb going to benefit me at all, or will the 3gb versions do me fine? I don't necessarily need to pinch pennies, but I also don't want to spend an extra $40 if it doesn't help.