So running two cards? One for the main display and the second card for the slave accounts gives the main the same performance as if it were running a single account (apart from the CPU load) ? I am considering upgrading from a 6970 to a 7970 due to a monitor upgrade and so I am wondering which would be the better upgrade, a second 6970 which would allow crossfire in other games and still give me good performance in Rift or going with the single 7970 which would cost about $200 more that the 6970. My main display is running at 2560x1600 and the 2 secondary displays are at 1600x1200.