For today's Eyefinity test we are using Civilization 5 but before we look at that performance we have also included a 1920x1080 test. At that resolution it was great to see the 6790 achieve playable performance with maximum detail and 8x anti-aliasing. The 550 Ti gives us higher performance (when AA is forced in the driver) however what it cannot do is power 3 screens at once which the Radeon can.
With 3 screens enabled for a more immersive gaming experience the 6790 performed flawlessly, offering us an average of 31fps.
Here is how the game looks at our tested settings.