If Microsoft had wanted to back-port DX12 to Windows 7, you would have thought they'd have done it before Windows 7 entered its long-term servicing state. Today's announcement is a pretty big surprise on a number of levels.
But, Microsoft made the decision long ago to only support DirectX 12 on Windows 10, with its WDDM 2.0 driver stack. There's many advantages to using this API over traditional DX11, especially for threading and draw calls. This was a response to single-threaded CPU performance plateauing, making complex graphical workloads increasingly CPU-bounded. As a consumer it's great to see them supporting their product ten years after it launched, but with the entire OS being put out to pasture in nine months, it seems like an odd time to be dedicating resources to bringing it new features." From the report: For some background, Microsoft's latest DirectX API was created to remove some of the CPU bottlenecks for gaming by allowing for developers to use low-level programming conventions to shift some of the pressure points away from the CPU. "Instead, Microsoft has stated that they are working with a few other developers to bring their DX12 games/backends to Windows 7 as well. "Now before you get too excited, this is currently only enabled for World of Warcraft and indeed it's not slated to be a general-purpose solution like DX12 on Win10," reports AnandTech. Microsoft has announced a form of DirectX 12 that will support Windows 7.
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