sate slotAn x16 slot is the largest PCIe slot and ideally connects to 16 PCIe lanes. However, in many cases, you can find a PCIe x16 slot with a physical size of a full x16 slot, but in reality, it would only be connected to four PCIe lanesBecause if it has PCIe slots, I would just get a PCIe card to NVMe adaptor and use that until you can plug the drive into the new machine. Another solution would be putting