Ok I currently have two gtx 780s in sli. The new assassins creed and shadow of mordor require more vram then my 3gb cards. I want to upgrade to one and maybe eventually two gtx980s should I wait for the 8gb version of them or go ahead and get the 4gb? Is waiting for more vram really that important. I want to be able to run all games on ultra for awhile if that's even possible. Thanks for any help. I currently have a i7 3820 processor and run games in 2560x1440p.