If you want to run multiple U.2 drives, then OCuLink on the host side should interest you: both the quad port AOC-SLG3-4E4T and the OCuLink to U.2 cables are r

If you want to run multiple U.2 drives, then OCuLink on the host side should interest you: both the quad port AOC-SLG3-4E4T and the OCuLink to U.2 cables are relatively cheap. https://forums.servethehome.com/index.php?threads/nvme-make-the-most-of-your-pci-e-slots-how-to-config-supermicro-boards-for-aoc-slg3-2e4t-et-al.17651/ https://forums.servethehome.com/index.php?threads/nvme-make-... Another choice is a somewhat more usual four M.2 card and https://click.intel.com/u-2-to-m-2-ssd-cable-replacement-u-2-to-m-2-cable-for-pcie-nvme-supporting-intel-solid-state-drives.html https://click.intel.com/u-2-to-m-2-ssd-cable-replacement-u-2... this cable. To me this seems much more of a hack than OCuLink.