AMD Instinct MI100 gets unlocked for local AI

This is fringe hardware hacking, not mainstream AI infra news, but LocalLLaMA builders care because cheap used accelerators can matter more than shiny new SKUs.

• –The MI100 was built for HPC and AI, with AMD originally positioning it around 32GB HBM2 and roughly 1.23 TB/s memory bandwidth, so bandwidth-focused tuning is directionally plausible
• –If the poster’s results hold up, they reinforce the idea that secondhand enterprise GPUs remain viable for local LLM experimentation and inference-heavy workloads
• –The post is still anecdotal and light on reproducible benchmarks, so the real takeaway is potential headroom rather than a confirmed performance breakthrough
• –For AI developers, this matters most in the homelab and local inference crowd, where price-to-bandwidth can beat chasing newer flagship cards