DirectX 10 is a collection of APIs for Microsoft Windows that facilitate access to system hardware to facilitate multimedia tasks, including video game programming, released for Windows Vista and 7.

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Why would I want to use a particular version of DirectX? How should I choose?

I've noticed a number of games lately that give me a choice of what version of DirectX to run the game with, usually 9, 10, or 11 (or some subset thereof). I have a graphics card that supports DirectX ...
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Varying framerates in WoW?

I think WoW may only be utilizing my SLI some of the time, or else Windows is not allocating it priority. I have two GeForce GTS 250's in SLI. Some of the time, WoW runs at 60 FPS when no characters ...
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Starcraft 2 — DirectX 10 effects?

I seem to recall rumors that Starcraft 2 looked better when using DirectX 10 over DirectX 9. Is this true, and if so can you give examples (preferably in screenshot form)?
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What's the difference between DirectX 10 and DirectX 9?

In Civilization V, when starting the game, it offers me the option of using DirectX 10 or DirectX 9. Are there any graphics quality or performance gains present when using the DirectX 10 version? I ...