http://www.guru3d.com/articles-pages/nvidia-geforce-gtx-970-and-980-reference-review,4.htmlThe GeForce GTX 900 series is DirectX 11.3 and 12 ready, with Windows 8, 7 and Vista also being compatible to take advantage of DirectCompute, multi-threading, hardware tessellation and the latest shader 5.0 extensions. The latest revision of DX12 is a Windows 8 feature only, yet will bring in significant optimizations. DirectX 12 - Direct 3D 12 (low overhead – cross-platform – ready now).
Dx12 features available now with win 8?