SAMSUNG SSD 990PRO PCIe 4.0 NVMe M. 2 Internal Solid State 1TB 2TB With Heatsink. Hard Disk For PC Notebook Desktop. Please carefully make your selection form the fallowing NVMe M. 2 (2280) SAMSUNG SSD. Digital Storage Capacity. Compatible Devices :Compatible with Desktops & Laptops. Hard Disk Interface. PCIe Gen 4.0 x4, NVMe 2.0. Bus Type:PCIe 4.0×4. Storage Memory: Samsung V-NAND 3-bit MLC. Dimension (WxHxD): 80 x 22 x 2.3 (mm). Up to 7,450 MB/s Performance may vary based on system hardware & configuration. Up to 6,900 MB/s Performance may vary based on system hardware & configuration. About Speed: different test softwares will get different speed, speed will be affected by many different factors, our datas only as reference. (1GB=1 Billion byte by IDEMA) Actual usable capacity may be less (due to formatting, partitioning, operating system, applications or otherwise). Package List: (Capacity Send by your choose).