NVIDIA has just released its first driver with support for DirectX 12 Ultimate, aimed exclusively at developers. Version 450.82 of the GeForce Game Ready drivers includes all the necessary components for DirectX 12 Ultimate logo certification, including support for DirectX ray tracing 1.1, variable-rate shading (VRS, levels 1 and 2), mesh shaders, and sample feedback, and provides everything needed to test games using this API.
All NVIDIA GeForce RTX 20 Series and Quadro RTX graphics cards are already DirectX 12 Ultimate compatible, but now the software is missing. “This sample driver is intended for developers testing their applications with DirectX 12 Ultimate. It supports DXR Tier 1.1, Sample Feedback and Mesh Shader”, you can read in the description of the driver.
NVIDIA has not made these drivers for public use, but they are exclusive to members of the NVIDIA Developer Program who are registered with the NVIDIA Developer Program.