M.2 M-key To PCIE 4.0 X16 Riser Card With Oculink SFF-8612 Riser
Please read regarding the TYPE of connector at the bottom of the listing and check the pictures.
this will allow you to connect a standard long adapter that plugs into a nvme slot and converts it to a pcie 16x slot.
it allows you toove storage or networking or secondary GPUs to another location.
This is a TYPE A connector which means the connector on the m2 slot is stood up.
If you have clearance issues then buy the TYPE B, this connector is positioned differently. This is also listed for sale on another listing.
Please note that the slot will only work in 4x mode as the nvme slot is 4x.