max out all settings, turn HBAO off, v-sync off(since doesn't work, but does lower performance)AA off, AF @ 4x, is good for 2560x1600 on single 5870. I cannot get v-sync working at all on 5870 currently. One of many things to look at this weekend for me. for Eyefinity, medium settings, or two cards, same settings. I notice a huge loss of in-game "scoring ability" with anything more than that9in other words, PC's performance is too slow, affecting online gameplay accuracy).