AMD Instinct MI355X
CDNA4 on 3 nm: 288 GB HBM3E, FP4/FP6 support, and Blackwell-class ambitions.
You're looking at a chip record: what this processor is, its key specs, who designs, manufactures and supplies its parts, and where it gets used.
Launched June 2025, the MI355X moves AMD to TSMC N3P and 185 billion transistors, adds FP4 and FP6 datatypes, and carries 288 GB of HBM3E at 8 TB/s. AMD's published figures — 10.1 PFLOPS FP8, 20.1 PFLOPS FP4 — put it in direct contention with Blackwell, and OpenAI, Meta, Microsoft and Oracle all appeared as named customers or partners during 2025. The liquid-cooled MI355X runs to 1,400 W.
Specifications & key facts
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Overview
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Sources
AMD Advancing AI 2025 announcement ↗
Record reviewed as of 2026-01-15 — see Methodology.