I am getting 132fps @ 1440p just outside Vault 111 (2 x 980Ti@1,439MHz, 4790K@4.6GHz, PG279Q@165Hz) with SLI enabled using the Batman Arkham City profile in NVidia Inspector and vsync disabled via NVidia Control Panel. There are some minor texture glitches though, so official SLI support would be welcomed.