GPU benchmarks - Dirt: Showdown (incl. 5760x1080)
 

Dirt: Showdown runs great on three monitors, and AMD even gave it the EyeFinity Optimized stamp of approval. We have to admit that playing a racing game like this on three monitors definitely adds to the immersion. You also don't need a high-end graphics card to run this game on 5760x1080 and Medium settings. Both the Nvidia GeForce GTX 660 and the AMD Radeon HD 7870 are fast enough to achieve 60 fps. Even the Radeon HD 7850 gets close.

http://uk.hardware.info/reviews/3689...incl-5760x1080