SK hynix BC901 512GB NVMe SSD – a fast M.2 SSD with a PCIe Gen4 x4 interface and OPAL 2.0 support. It delivers much higher performance than a standard SATA SSD, with sequential speeds of up to around 4400 MB/s read and 3000 MB/s write. In practice, that means faster Windows boot times, quicker app loading, and a more responsive overall system. It is a good choice for upgrade or replacement in compatible laptops and workstations.