DirectX - Special components that allow games and graphics programs to work on Windows operating systems. The DX principle is based on providing direct software access to the hardware of the computer, or rather, the graphics subsystem (video card). This allows you to use the full potential of the video adapter for drawing an image.
See also: What do you need DirectX
DX editions in Windows 7
In all operating systems, starting with Windows 7, the above components are already built into the distribution. This means that it is not required to install them separately. For each edition of the OS, there is its maximum version of the DirectX library. For Windows 7 is DX11.See also: How to update the DirectX libraries
To enhance compatibility, except the new version itself, in the system there are presence files of previous editions. Under normal conditions, if the DX components are not damaged, games written for the tenth and ninth versions will also work. But in order to start the project created by DX12, you will have to install Windows 10 and in any way differently.
Graphic adapter
Also, what version of the components is used in the operation of the system, the video card affects. If your adapter is quite old, then it may be able to support only DX10 or even DX9. This does not mean that the video card is not capable of functioning normally, but new games for which new libraries are required will not be launched or issuing errors.
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Learning the version of DirectX
Determine whether the DirectX video card supports
Games
Some gaming projects are designed in such a way that the files of both new and outdated versions can use. In the settings of such games, there is a DirectX edition point.Conclusion
Based on the above, we conclude that we cannot choose which library edition to use in your operating system, it has already made Windows Windows developers and graphic accelerators. Attempts to establish a new version of components from third-party sites will only lead to loss of time or at all to failures and errors. In order to enjoy the possibilities of fresh DX, you must change the video card and (or) to install a new Windows.