Instinct MI355X is coming to market. 288GB HBM3E memory, 8TB/s bandwidth, and expanded FP6 and FP4 datatype support. Phoronix had a limited hands-on:

Yesterday I was invited along with a small group of others to try out the AMD Instinct MI355X accelerator down in Austin, Texas. The AMD Instinct MI355X is fully supported with the newly-released AMD ROCm 7.0.

The AMD Instinct MI355X "hands on" yesterday to celebrate ROCm 7.0 and the MI350X/MI355X hardware ended up being just following a guided Jupyter Notebook for an AI demo... And one that wasn't even performance-related or anything unique to the AMD Instinct MI350 series capabilities. Not quite the hands-on time expected with originally hoping there would be enough time to tap some MI355X accelerators unconstrained and run some AI/LLM benchmarks at least with Llama.cpp and vLLM. Nevertheless via Jupyter Notebook's terminal allowed for poking at the MI355X on ROCm 7.0 during this demo session.