Samsung 990 PRO PCIe 4.0 NVMe M.2 SSD 4TB

The primary distinction between the Samsung 990 PRO 4TB and the 2TB model lies squarely in storage capacity, offering double the space for demanding users or large data libraries. While both drives share the same high-speed PCIe Gen4 x4 NVMe interface and identical maximum sequential read/write speeds of 7450/6900 MB/s, the larger 4TB version provides significantly greater endurance, boasting a TBW rating of 2400 compared to the 2TB model's 1200. Furthermore, the 4TB variant exhibits superior random read performance at 1,550,000 IOPS versus 1,400,000 IOPS for the smaller drive, though both offer ample cache memory. The 2TB model does note the inclusion of SED/FDE encryption features that are not explicitly listed for the 4TB version. Ultimately, the choice hinges on whether maximum capacity and longevity outweigh the slight cost saving of the 2TB option.