DirectX 9 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 XP, Vista, and 7.

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How to turn on Direct3D acceleration

Hi I was trying to play the settlers 6 which as I know uses DirectX 9. During startup it said Graphics Engine could not be initialized so I started dxdiag where one point was deactivated: Direct3D ...
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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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Directx.log internal system error when trying to install Need for Speed: Most Wanted [duplicate]

Possible Duplicate: I don't have a dedicated GPU and I can't install DirectX to play NFS Most Wanted Still nobody is solved the problem about Directx.log. Following message occurs ...
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NFS: Most Wanted complains that D3DX9_26.DLL is missing

I am struggling to play NFS: Most Wanted on my laptop. It has windows 7 and DirectX 11. But when I start NFS it says that D3DX9_26.DLL is missing. I used to play this game on my PC which had Windows ...
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How do I troubleshoot the 'd3dx9_35.dll is missing' error?

I just downloaded and installed The Witcher from GOG.com. However, when attempting to launch the game (the game itself, after the launcher) I get the following error: The program can't start ...
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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 ...