Features: 1.FAST TRANSMISSION: SSD have excellent read and write speeds, 4 times faster than traditional drives 2.DIFFERENT READ and WRITE SPEED: 1TB read and write speed is 580?600/380?450 M/S 512M external cache. 240G read and write speed is 550?560/380?420 M/S 256M external cache. 64G read and write speed is 460?470/75?95 M/S 512K built in cache 3.STABLE OPERATION: SSD supports SLC caching algorithm, which can greatly increase the speed of reading and writing, ensuring intelligent optimization and stable operation 4.SUPPORTED FUNCTIONS: SSDs have S.M.A.R.T. Support monitoring technology and Win TRIM optimization commands, so you can use them with confidence to meet your needs 5.TRIM OPTIMIZATION COMMANDS: Built in ECC and wear level technology can improve the reliability of data transmission and extend the service life specification:Item Type:SSD Material: Aluminum Alloy Hard Disk Size: 2.5 In 64g Read and Write Speed: 460-470/75-95 M/S 512K Built in Cache 240g Read and Write Speed: 550-560/380-420 M/S 256M External Cache 1tb Read and Write Speed: 580-600/380-450 M/S 512M External Cache Interface Type: SATA3 Interface(6Gbps) Main Control: SMI2258XT /EN Particle: MLC Multi Layer Unit Shock Resistance: 1500G Working Temperature: 0 to 70 Storage Temperature: -40 to 85 S.M.A.R.T. Support: Support TRIM Function: Support TRIM Support NCQ Instruction Set Support TRIM Instruction Set Support Average Erasing and Compensating PackageList:1 x SSD