AMD's Instinct MI series products are thought to be among the most potent HPC and AI accelerators when they arrive in Q4, and AMD has officially announced two variants. However, it appears the MI300A and MI300X aren't the only variants AMD has planned for the market — the first signs of a new mysterious MI300C variant have emerged in Linux patches. It's possible that this new variant either marks the arrival of a CPU-only MI300 that will be AMD's first HBM-equipped processor or a specialized cut-down variant that adheres to the U.S. sanctions for exports into the Chinese market. In fact, AMD recently stated that the company is working on optimizing its product line to comply with U.S. export restrictions to export to China, making this a very realistic possibility.
The MI300, touted as the world's first data center APU, features a multi-chiplet design that combines AMD's Zen 4 and CDNA 3 microarchitecture. The chiplet-based design allows AMD to swap out tiles to make different combinations. The basic MI300 design has 13 chiplets, most 3D-stacked, and comprises nine 5nm compute logic chiplets over four 6nm I/Ochiplets.
