While we were playing at 2560x1600 with Ultimate in-game settings, we enabled 2X SSAA. The result was the highest playable setting that the AMD Radeon HD 7970 GHz Edition CrossFire could handle. It averaged 40.1 FPS at these settings. Still, enabling 2X SSAA at this resolution was 32.4% slower than when using just FXAA at this resolution, for the AMD Radeon HD 7970 GHz Edition CrossFire. The NVIDIA GeForce GTX 680 SLI was 61.1% slower with 2X SSAA enabled, and was unplayable with an average framerate of 28.3 FPS. The GeForce GTX 680 SLI struggled severely, with the framerates constantly jumping between 10 and 20 FPS. It was never steady. We could not even finish the mission with these settings, it was taking extended periods of time to move through each camp, and eventually we just could not make a jump because the lag was too bad.
The NVIDIA GeForce GTX 680 SLI was the more powerful solution at 1920x1080 with 4X SSAA enabled, with an average framerate of 68 FPS. At 2560x1600 with FXAA enabled, the NVIDIA GeForce GTX 680 SLI was again faster with a 72.8 average framerate. The NVIDIA GeForce GTX 680 SLI could not handle 2X SSAA though at 2560x1600. Its performance was over 60% slower after enabling 2X SSAA than it was with FXAA enabled. The AMD Radeon HD 7970 GHz Edition CrossFire provided the second best overall experience at 2560x1600 with 2X SSAA enabled. It averaged 40.1 FPS at these settings, which was playable for us. It took second because the performances at 1920x1080 with 4X SSAA were clearer, more efficient, and faster. This allowed for a lag free experience with the best image quality.