Anyone has experience with 16x5090 (or other GPU) on TURIN2D24G-2L?

[Emil_N]

Is this issue similar to this?

A Neverending Story: PCIe 3.0/4.0/5.0/6.0/Sci-Fi+ | Bifurcation, Adapters, Switches, HBAs, Cables, NVMe Backplanes, Risers & Extensions - The Good, the Bad & the Ugly - Will there be a final solution?

Managed to increase the MMIO size for my AM5 Aorus Master from 1TB to 16TB, and now P2P works fine, no D4 QCode error. Basically dumped the ITF info from the BIOS and with Claude managed to do it, posted it here Also sent my PM50100 switch for service and it arrived just today to C-Payne. Fingers crossed!