Samsung 990 PRO NVMe PCIe Gen 4.0 HIATSINKCapacity: 1TB 2TB Interface: PCIe Gen 4. 0 x4, NVMe 2. 0 Form Factor: M. 2 2280 with integrated heatsink Sequential Read Speed: Up to 7,450 MB s Sequential Write Speed: Up to 6,900 MB s Random Read Speed (QD32): Up to 1,200,000 IOPS Random Write Speed (QD32): Up to 1,550,000 IOPS NAND Flash: Samsung V NAND 3 bit MLC (TLC) Controller: Samsung in house controller Cache: 1GB LPDDR4 DRAM Dimensions (with heatsink): 80 x 24. 3 x 8. 2 mm Weight: Max 28. 0g