So I have a 4gb gtx 960 and some games run with no noticeable lag in 4k on my 50 inch TV such as subnautica and solus project but when updating my drivers in the nvidia settings thingy I noticed where it says current resolution 4k 30hz or whatever it says native 1920x1080 does this mean I'm not actually playing in 4k even though 4k is selected as my output sorry if this is a dumb question I just can't afford a better video card yet and am I better off playing at 1920x1080 even though I don't notice any lagging?