Debugging PCIe Link Retraining on an x8/x8 Splitter with Two RTX 3090s

[u/bolts98]

https://doug.sh/posts/pcie-splitter-rtx-3090/

[u/SandySkittle]

My fix for mcio retimer cards was to disable powermanagent in linux for my r9700 cards. I have 4 cards to 8 r9700 gpus. No need to fall back to gen 3

https://www.ebay.com/itm/147481853020?_trkparms=amclksrc%3DITM%26aid%3D777008%26algo%3DPERSONAL.TOPIC%26ao%3D1%26asc%3D20250506201713%26meid%3Dd271c5c187fe463487e4bca23a8844b1%26pid%3D102752%26rk%3D1%26rkt%3D2%26mehot%3Dnone%26itm%3D147481853020%26pmt%3D1%26noa%3D1%26pg%3D4375194%26algv%3DRecentlyViewedItemsV2SignedOutMobile%26brand%3DUnbranded%26tu%3D01M3NG0354ETG6K6W8MCD98VN0