https://wccftech.com/amd-radv-radeon-vulkan-drivers-ray-tracing-support-gcn-gpus/

The Mesa Project has added an updated Radeon Vphoroniulkan driver, also known as RADV, which would allow the driver to support Vulkan ray-tracing on previous generations of AMD graphics cards and support the newest components company. The further support will allow Vulkan ray-tracing as far back as AMD GFX6 hardware that utilizes linear bounding volume hierarchy, or LBVH, such as the GCN graphics cards. While ray-tracing on older graphics cards is much slower, it will benefit prior generations with slightly better graphics output.

Konstantin Seurer, an independent developer, worked for some time to allow for access to the LBVH support for RADV. His approach to the project was similar to building compute structures for acceleration. As seen on current graphics processors, specific workloads, such as the GravityMark benchmark test, allowed the AMD GPU structure to reach as low as -13 FPS to up to -250 FPS.