I have not tried the beta drivers yet, just the latest whql ones. I never have issues w/ confluxes/maws, just avatars, songs, certain weapon skills, and certain spells. I 4box a lot and things are good unless the avatars/specific weapon skills go off,or songs/spells(this goes for single ffxi open as well). I'm intrigued because Helel's has the same card as me, and found custom drivers that work for him (
http://www.ffxiah.com/forum/topic/26418/nvidia-gtx-560/#1594426 ), but they're still HELP I AM TRAPPED IN 2006 PLEASE SEND A TIME MACHINE for me (although slightly better than what nvidia puts out). one of my friends have a a 400 series card, and everything works fine. I've also read that the 570/580 (with the supported driver 266.85 i believe, works perfectly as well)