Depends on the resolution of the monitors. If you're going to using 1080 monitors, stick to 780Ti. If you're going for 1440 or 1600 monitors, you'll probably find use for the extra 3GB of RAM. Not many games can use that much memory without lots of texture mods and high levels of AA, but if you happen to play Battlefield 4, that's one game that can use up over 4GB at extremely high resolutions.