MCIO Adapter Card Identified as Root Cause of GPU Server AER Errors

Troubleshooting of multi-GPU servers confirmed that MCIO adapter cards, not retimers or cables, were causing AER errors. After replacing the adapters, users report zero AER errors.

2026-09-30 ~ 2026-09-30 · 2 related posts

• GPU server AER errors traced to MCIO adapters, zero errors after swap — TheZachMueller · 2026-09-30

1 near-duplicate retellings: TheZachMueller