Meeting growing demand for TLC SSD, ADATA's Premier SP550 is equipped with TLC flash and an SMI controller, providing users an affordable upgrade without sacrificing performance. Featuring LDPC ECC Engine (Low Density Parity Check ECC), RAID Engine, and Data Shaping, the Premier SP550 ensures data integrity and maintains high stability. It also features ultra-high TBW (Total Bytes Written) for superior durability. Additionally, it supports SLC Caching and DDR3 DRAM Cache Buffer, dramatically improving read/write speeds. If you're looking for an upgrade with a superior cost-performance ratio, the Premier SP550 is undoubtedly an ideal choice! Capacity 120GB / 240GB / 480GB Form Factor 2.5" NAND Flash TLC Controller SMI Dimensions (L x W x H) 100.45 x 69.85 x 7mm Weight 68g / 2.4oz Interface SATA 6Gb/s Performance(Max) 120GB Performance (ATTO) Read: Up to 560MB/s Write: Up to 410MB/s Maximum 4K random R/W IOPS: 60K/70K 240GB Performance (ATTO) Read: Up to 560MB/s Write: Up to 510MB/s Maximum 4K random R/W IOPS: 75K/75K 480GB Performance (ATTO) Read: Up to 560MB/s Write: Up to 510MB/s Maximum 4K random R/W IOPS: 75K/75K *Performance may vary based on SSD capacity, hardware test platform, test software, operating system, and other system variables. Operating temperature 0~70°C Storage temperature -40~85°C Shock resistance 1500G/0.5ms MTBF 1,500,000 hours