RDNA5 architecture tea leaves — what the leaked driver changes tell us

AMD ROCm and AMDGPU driver branches dropped patches that hint at RDNA5. Memory controller and ray tracing changes are the structural reads.

AMD open-source driver branches dropped patches over the last six weeks that paint the cleanest RDNA5 architecture picture yet. The patches add support for a new memory controller layout that doubles peak bandwidth without raising width, and ray tracing primitive changes that look like a major BVH update.

The structural reads: RDNA5 is going to compete on RT for the first time, and the memory bandwidth jump means the high-end GPU SKUs can stop being VRAM-starved. AMD has been losing high-end share for two cycles on exactly these two axes — the fix is finally on the engineering roadmap.