sate slotMost desktop 2.5 drive bays are open-top, open-back and can handle any 2.5 drive, but occasionally you'll find a slot bay desned for one specific heht of drive (usuallyAn 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 lanes