Motherboards and BIOS MUST support bifurcation, otherwise only the first drive can be recognized.
Connect a U.2 (SFF-8639) NVMe SSD to the PCIe x4 slot in a motherboard with a SFF-8654 to SFF-8639 cable. (No included SFF-8654 to SFF-8639 cable).
Not supporting SAS or SATA SSD.
85Ohm PCB, optimal traces.
Full height and low profile bracket included. NOT support hot swapping!