Supports powerful SLC Cache performance QX upports SLC Caching technology and enjoys a smooth user experience with a fast read / write speed of up to 560/500MB/s. 4TB consumer-grade 2.5" SATA SSD TEAMGROUP QX SSD is a consumer-grade 2.5" SATA SSD with up to 4TB of storage capacity that meets the needs of ultra-large capacity requirements. A monster that can defeat mechanical hard drives. With the latest 3D QLC flash memory, it offers the same terabyte capacity of a mechanical hard drive, as well as features that traditional mechanical hard drives do not have, such as powerful read/write performance, low power consumption, shock resistance and noise-free. QX 2.5" SSD Crystal Disk Mark: Read: Up to 560MB/s Max ; Write: 500MB/s Terabyte Written (TBW): 2TB - 690TBW 4TB - 1000TBW SATA SSD Comparison Advanced - AX2 Elite - EX2 Quantum - QX Capacity 256GB / 512GB / 1TB / 2TB Capacity 512GB / 1TB / 2TB / 8TB / 16TB Capacity 2TB / 4TB Interface SATA III 6Gb/s Interface SATA III 6Gb/s Interface SATA III 6Gb/s Performance 512GB Read: 530MB/s, Write: 470MB/s 1TB&2TB Read: 540MB/s, Write: 490MB/s Performance All capacity Read: Up to 550MB/s Max , Write: 520MB/s Performance All capacity Read: Up to 560MB/s Max , Write: 500MB/s Vibration 20G (non-operating)) Vibration 20G (non-operating)) Vibration 20G (non-operating)) MTBF 1,000,000 hours MTBF 1,000,000 hours MTBF 1,500,000 hours