M.2 SSD

M.2 is a common interface for NVMe SSDs due to its compact size and high bandwidth capabilities, however NVMe SSDs can also be found in other form factors such as PCIe add-in cards (PCIe SSDs) and U.2 drives.

PCIe SSDs typically use PCIe expansion slots on the motherboard and can offer even higher performance compared to M.2 SSDs. U.2 drives, on the other hand, resemble traditional 2.5-inch SATA drives but use the NVMe protocol over a U.2 connector.

M.2 NVMe SSDs are prevalent in many consumer devices due to their compact size, other form factors exist for NVMe SSDs to accommodate different system configurations and requirements.