00:00
2026-09-27
doug.sh
ai-infrastructure
Debugging PCIe Link Retraining on an x8/x8 Splitter with Two RTX 3090s
A developer running Qwen3.8-27B across two RTX 3090s on an ASUS TUF X570-Plus motherboard traced a vLLM model-loading stall of over ten minutes to PCIe link retraining on a passive x8/x8 bifurcation sā¦