M.2-Oculink eGPU Link Silently Downgrades to PCIe Gen1 — Here's How to Check
El_90 · reddit · 2026-09-11
The author found their Strix Halo + M.2-to-Oculink + Radeon AI PRO R9700 setup silently running at a downgraded link (speed and width reduced) due to the adapter, hurting model load and layer swapping. They share lspci -vv commands to check LnkSta for 'downgraded' flags and ask for tools to measure real-time PCIe bandwidth, as rocm-smi/iostat failed.
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