3DMark is a program with a set of several 3D benchmarks. The Cloud Gate benchmark measures DirectX 10 performance, while Sky Diver also measures DirectX 11 performance being aimed at average computers. Fire Strike benchmark measures DirectX 11 performance and is targeted to high-end gaming computers. Fire Strike Ultra is the same test, but runs at 4K UHD resolution.
In this test, the GeForce GTX 980 Ti was 6.5% faster than the Radeon R9 Fury X.
On the Sky Diver benchmark, the GeForce GTX 980 Ti was 11% faster than the Radeon R9 Fury X.
On Fire Strike, the GeForce GTX 980 Ti was 5.5% faster than the Radeon R9 Fury X.
The Fire Strike Ultra is the “heaviest” benchmark available in this program. Here, both cards had similar performances.