The reason I tried SLI after first buying a single 680GTX back in late 2012 was due to Chalenge correctly giving me information about it working here in AH. SKuzzy also chimed in, saying that although the profile was older, it DID exist, and did work. Huge changes and increases in performance weren't as obvious in AH as in other games, and back then Skuzzy explained it pretty well, how the drivers, AH code, and SLI cards all worked together IN Ah. Other programs like DCS, and many Steam related games like CS GO and piles of others benefited greatly from going SLI in my experience with the systems I built, but it could be a giant PITA at times, no doubt, and there are some games that don't use it at all, like Arena Commander/Star Citizen at the moment, where it hasn't been implemented properly yet (it sort of works, tons of bugs though).