According to Hans-Kristian Arntzen, a prominent open-source developer working on Vkd3d, a DirectX 12 to Vulkan translation layer, Starfield is not interacting properly with graphics card drivers.
They released on two different platforms. PCs have so much variation in hardware, it’s not surprising there are issues with it.
It’s poorly optimized code, and the comments from the top brass has been “lol your PC sux” when they can’t even get it running right on their own hardware.
It’s not the variations of PC that’s the issue, it’s a design and quality control issue. Direct X and Vulkan are the bread and butter of PC gaming. Microsoft developed direct X to establish a common graphics framework for Windows and Microsoft game studio still fucked up working with it.
common graphics framework for Windows
They could have picked Khronos’ APIs. They think they are smarter than everyone else including GPU developers.