Used good, Samsung 980 PRO PCIe® 4.0 NVMe® SSD 1TB ... Only M.2, no box and no accessories ... Interface - PCIe® Gen 4.0 x 4, NVMe® 1.3c ... Compatibility- ... 980 PRO is backward compatible with PCIe® 3.0. Sequential performances (up to): 3500MB/s for reads, 3450MB/s (1TB) for writes. Random (up to): 690K IOPS (500GB/1TB) for reads, 660K IOPS (1TB) for writes. ... Read/Write Speeds - 7,000/5,000 MB/s ...