CS2 implements the Vulcan API, which is supposedly supposed to increase performance, but in CS2 it is still incomplete and only decreases FPS.

So it's better to stay on DirectX for now, it is not yet known exactly on which DirectX the game will stop, either it will be 11 or 12. Below we give you some tests:

Average FPS:

1. DX11: 265,6
2. Vulkan: 216,9 (-18,33%)

1% FPS:

• DX11: 170,1
• Vulkan: 151,2 (-11,11%)
  

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Interesting information

Vulkan:

Vulkan is a modern and low-level graphics API developed by the Khronos Group. It provides more direct access to the hardware resources of the graphics card, allowing developers to better control performance and optimize graphics applications.

1. Vulkan provides greater parallelism and lower overhead than some other graphics APIs such as DirectX 11.
2. It allows better utilization of the power of modern multiprocessor systems and is suitable for cross-platform application development.
   

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DirectX:

1. DirectX is a set of graphics and multimedia APIs developed by Microsoft. In the context of gaming, especially on the Windows platform, DirectX has long been one of the most popular choices for developers. 
2. DirectX provides a more abstract and user-friendly interface compared to Vulkan, making it more accessible to developers without deep experience in graphics programming. 
3. With DirectX, there are several versions such as DirectX 9, DirectX 11, and DirectX 12, each providing different levels of functionality and performance.

When it comes to CS:GO, the game used DirectX 9.