I use an AMD card, playing on Bazzite. How and when, do i know when its best to use Vulkan or Directx on linux?
this post was submitted on 14 Jun 2024
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DirectX is a Windows thing, so you'll just have those calls translated to Vulkan under the hood (DXVK). You'll probably get better performance from just setting it to Vulkan directly.
Edit: As some others say, for BG3 specifically, DXVK does a really good job. My personal experience is that "the best" option is very patch dependent. At launch Vulkan was best, then after a few patches did DXVK ran better, but personally I'm back to straight Vulkan, for no other reason than wanting to be a +1 in the statistics.
What about OpenGL? What's that and should I choose it instead of DirectX?
OpenGL is a bit like Vulkan, but discontinued since... 2014, with a single update since then. It was actually stopped because Vulkan seemed better, and both API's were maintained by the same organisation.
In general it's more likely to work on older devices, but would be less performant than Vulkan.
OpenGL is an older graphics API with a lot of issues I won't get into here.
You're almost guaranteed to be better off using DXVK.