Running it 5760x1080 and I can max everything except can't run the 4xMSAA and keep it at 60fps. It appears to stay at a solid 60fps but some areas I feel like it drops even though afterburner says it does not. SLI 980s on a 3930k.
I wish there was a 2xMSAA option as I feel it could handle it, lots of areas 4x would be OK but there are also lots where it dips to low 50s.