Can confirm that in the p350 that switching to the x4 riser seems to allow x550-t2 to work. I originally had a stock x8, as I ordered the model with a GPU. Adding the x550-t2 in the x8 riser caused the system to hang and not boot.
I tried the tape mod and everything else I could think of. Thought that a x8 riser would work for a x4 card.
Just recently bought a p3 tiny gen 1 and gen 2. In my gen 2 it's the same thing. I have an x8 riser that I added the x550-t2 too. It did not fail to boot like my p350. But failed to detect the card in proxmox. I have a x4 riser orders and on its way that compatible with the p3 tiny gen 1 and gen 2s, 5C50W00909. Kinda of expensive.....I wonder if the older generation x4 risers would work on the newer p3 tiny gen 1 and gen 2s. I am just worried I'll try it and it will fry something.
For the x550-t2, I also 3d printed a bracket for the card and a shroud of an internal fan to help cool the nic. Untrusted store also sells kits which is awesome! They even have the models online for free!
I tried the tape mod and everything else I could think of. Thought that a x8 riser would work for a x4 card.
Just recently bought a p3 tiny gen 1 and gen 2. In my gen 2 it's the same thing. I have an x8 riser that I added the x550-t2 too. It did not fail to boot like my p350. But failed to detect the card in proxmox. I have a x4 riser orders and on its way that compatible with the p3 tiny gen 1 and gen 2s, 5C50W00909. Kinda of expensive.....I wonder if the older generation x4 risers would work on the newer p3 tiny gen 1 and gen 2s. I am just worried I'll try it and it will fry something.
For the x550-t2, I also 3d printed a bracket for the card and a shroud of an internal fan to help cool the nic. Untrusted store also sells kits which is awesome! They even have the models online for free!



