(03-31-2018, 10:49 AM)Nintendo Maniac 64 Wrote: I don't know if it's still the case, but on Radeon GPUs it was recommended to use D3D for 'hybrid', though both Vulkan and D3D worked for 'exclusive'.
I believe that was for NVidia GPUs - some driver/hardware combinations still stuttered on hybrid with both Vulkan and OpenGL, but DX11 was fine. This was against the previous recommendation of OpenGL being /slightly/ faster in some cases for NVidia (though any remotely modern GPU will likely not need to worry about small speed improvements anyway).
I think all the options for radeon don't stutter, but their OpenGL is generally slower than DX11, and Vulkan often faster than that.
As for this issue - it may be that it's a cpu limit not a gpu - a 580 should be more than powerful enough. I know that there were some performance improvements specifically for Ryzen after the 5.0 release, so maybe trying the latest dev release would be useful?