a full gk104 found in the 680/770 and the full tahiti found in the 7970/280x is only barely able to handle a full highest possible quality s.t.e.p. install with boris's enb, you need a 780/290 to handle that. with 4k monitors now out and many mods being revamped for 8k textures, even a single 780ti/290x is going to have trouble at that resolution. but most are not willing to run a full step install as it can take about 15-25 man hours to fully do it right after cleaning, bashing, and tagging. if you are just going to install a bunch of mods you come across, get ready for a broken game after 60-120 hours of game time.