In the Video settings for the video-game Smite, in the right half, above ANTI ALIASING and below SCREEN TYPE, there is a checkbox to "Use D3D11". What does it do exactly?

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    D3D11 should stand for Direct3D 11. I suspect it's optional since most video cards don't handle DirectX 11. It'll do the usual performance enhancements. – Frank Dec 9 '13 at 2:09

Enabling that option will cause the game to use Direct3D 11 as it's rendering API. By default, the game should use Direct3D 9.

Direct3D is a library used to access the graphics card and perform the hardware-accelerated rendering that basically every modern game requires.

D3D9 is an older version of the API, but up until recently was almost always the default because it would run on many more machines.

D3D11 is a more modern version of the library with newer features, and can provide improved visual fidelity. It may also affect performance (positively or negatively, depending on how the game uses it and what hardware you have).

To use D3D11 features you need Vista or better and a D3D11-capable graphics card. If you only have Vista or better, a game may still allow you to use D3D11 the API, but it won't be able to actually use any of the features of D3D11 (since you'd be using D3D11 with one of the 9.x feature levels).

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  • Are you implying that the restriction of whether or not that one may use it is dependent on operating system? Thus, anyone with sufficiently new operating system to try D3D11, should give it a whack? – NiteCyper Dec 9 '13 at 8:12
  • Correct. Presumably the game is only enabling that checkbox if you meet the requirements (detailed above), so you should give it a try and see if it improves performance or visual quality. – user6789 Dec 9 '13 at 16:14

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