AMD MI500X ISA reportedly adds a shared TDM MoE descriptor

snowclipsed · x · 2026-07-22

• A repost points to an “Inside Rubin” blog post and a SemiAnalysis scoop on AMD's MI500X ISA.
• The reported detail is that the ISA includes a single TDM MoE descriptor shared across all experts.
• The post also notes that MI455X is adding TDM, nicknamed RMA, which is described as resembling NVIDIA's Hopper SM90 TMA mechanism.

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