Learn more about the Sandisk SD8SB8U-128G-1122. Inaccurate specs? Let us know. Feedback. Model: Brand Sandisk, Series X400, Model SD8SB8U-128G-1122, Device Type: Internal Solid State Drive (SSD). Details: Form factor 2.5", Capacity 128GB, Memory components TLC, Interface SATA III. Performance: Max sequential read up to 540 MBps, Max sequential write up to 340 MBps, 4KB random read up to 93,500 IOPS, 4KB random write up to 60,000 IOPS, MTTF up to 1.75M hours. Features: Up to 1TB in a single-sided M.2 2280 and 2.5" 7mm form factors. nCache 2.0 maximizes read/write operations and improves responsiveness. Greater reliability with DataGuard Client and the new LDPC error correction mechanism. Available in 128GB, 256GB, 512GB, and 1TB capacities in both 2.5" 7mm and M.2 2280 form factors. Better slumber mode for greater low power efficiency.