AMD Eyefinity

Eyefinity question only. (I can't find where to change the resolution out of Eyefinity, either. Not within the Adrenalin software) Noob question, I know. Using my son's 7900XTX temporarily and I have three displays. I'm trying to finish Horizon Forbidden West, which will not play at 11520x2160...

i just purchased the gigabyte geforce gtx 980 ti g1 gaming beast even with that some games lags for a part of a second from time to time like farcry 4 and gta v and call of duty :aw stutteres alot when using supersampling 16x my pc preferences i have a cpu :intel i5-3450 3.1 ghz 6mb cache...