TechSpot published Gears of War 4 Benchmarked
A quote from the article:
Gears of War 4 is DX12-only, meaning the game has been built from the ground up to leverage this low-level API on both the PC and Xbox versions. In an effort to figure out performance, we've thrown not 20 or even 30 graphics cards at this title, but 40 -- 41 to be exact.Gears of War 4 Benchmarked @ TechSpot