3DMark - Firestrike Ultra
Fire Strike is a new DirectX 11 showcase benchmark designed for high-performance gaming PCs. The benchmark features real-time graphics rendered with detail and complexity far beyond what is found in other benchmarks. Fire Strike Ultra takes things a step further by running at 4K resolutions.
Performance Settings - Benchmarks Only
Testing 4K is a difficult task since you not only need a 4K monitor but also a video card that can handle the extra load. Fire Strike Ultra will simulate 4K and scale the output to whatever resolution you have available. Of course success with 4K comes down to frame buffer and memory bandwidth. (eg more memory wins)