pci express - What PCIe slots lanes do I have and do they overlap ...
Waiting for your replies, I used HWiNFO to see what slots do I have now and there is indeed one PCI Express Gen2 x1 slot free, but is covered by the graphics card (I've opened the case and got the graphics card out just to be sure).
Mainboard Asrock B550 Pro 4
Expansion Slots. 1 x PCI Express x16 slot, integrated in the CPU: Supporting PCIe 3.0 x16 mode 1 x PCI Express x1 slot, integrated in the Chipset: Supporting ...
Echo Express SE IIIe (Thunderbolt to PCIe Card Expansion System ...
EXPANSION CHASSIS FOR PCIE CARDS: Increase the PCI-e slot count of a desktop computer or server; Add four external PCIe x1 slots; PCI Express 2.0 x2 proprietary USB-C Host Card with locking port; 5.9ft (1.8m) USB-C locking cable included.