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PM991a 256G 512G 1T 2230 2242 2280 PCIe 3.0X4 PM9B1 PCIe4.0X4 256GB M.2 NVMe Solid State Drive Original FOR SAMSUNG SSD PM991   128G  M.2 2230 PCIE3.0 NVME read 1650MB/S write 1300MB/S PM9B1 256G 2242 Solid State Drive Model: MZAL4256HBJD-00BL1 NAND flash memory: V-NAND V6 TLC Interface: PCIe Gen4 x4 slot Sequential reading: 2955 MB/s Sequential writing: 1174 MB/s Condition: Brand new original genuine product pm991a 256G 512gb 2242 NVMe Protocol PCIe Gen3.0x4 TLC Flash Memory Sequential read speed 3100MB/s Sequential write speed 1400MB/s PM991A 1T 2230 brand new original box genuine M.2 PCIE black label Read 3100MB/S and write 2000MB/S Pm991a 1t 2280 brand new genuine product performance benchmark 980 1t read-write 3100mb/s 2000mb/s