I just purchased a second 780 SC so that I can have two in SLI because I game on three 1080 monitors at 5760x1080 and I don't want to upgrade for 3 or 4 years. Is the 3GB of VRAM enough or should I do the EVGA step up program and go to the 6GB 780SC? So far I haven't had any issues with even a single 780 on surround but in the future I don't want to need 4GB of VRAM minimum for High Settings like in Watchdogs or Shadow of Mordor.