AMD needs to put a lot more effort into Eyefinity functionality and interface improvements, but until then, try this . . . Power off your PC. Switch off your 3rd monitor and disconnect the power cord. On PC restart, Windows and Eyefinity will only see 2 monitors. Make a new Eyefinity 2x1 group of your 2 same-resolution monitors. Reconnect your 3rd monitor. Open Windows Settings > Display, and move the 3rd monitor to where you want it, and make any needed settings adjustments. Not certain that this will do what you want, but maybe.