Scrying the AMD GFX1250 LLVM Tea Leaves for MI455X Insights

Scrying the AMD GFX1250 LLVM Tea Leaves

I analyzed LLVM commits to uncover the architecture of AMD's upcoming MI455X accelerator. The new GFX1250 chip merges cache hierarchies, supports massive register files, and combines RDNA4's programming model with CDNA4's performance. It strips away graphics features to focus purely on compute, signaling a bold shift in AMD's AI strategy.

"We're seeing that this GFX125x is even more of a pure compute accelerator than even prior CDNA architectures with nearly all graphics features having been removed."