Crucial P3 Plus 4TB PCIe Gen4 3D NAND NVMe M. 2 SSD up to 5000MB/s CT4000P3PSSD8. NVMe (PCIe Gen4 x4) technology with up to 5000MB/s sequential reads, random read/write 650K/900K IOPS. Spacious storage up to 4TB. Performs up to 43% faster than the fastest Gen3 NVMe SSDs. Rated at MTTF greater than 1.5 million hours for extended longevity and reliability. Backward compatibility with Gen3.