Samsung 990 Pro 500GB 1TB 2TB SSD PCIe Gen 4.0×4 Solid State Drive NVMe 2.0 M. 2 2280 Internal SSD for Desktop Laptop. Please carefully make your selection form the fallowing NVMe M. 2 (2280) SAMSUNG SSD. Digital Storage Capacity. 500 GB / 1TB / 2TB. Compatible Devices :Compatible with Desktops & Laptops. Hard Disk Interface :NVMe. Bus Type:PCIe Gen 4.0×4. Max Sequential Read :7450MB/s. Max Sequential Write :6900MB/s. Storage Memory: Samsung V-NAND 3-bit MLC. Dimension (WxHxD): 80.15 x 22.15 x 2.38 (mm). Item Weight :0.01 Pounds. Performance may vary depending on system hardware and configuration. Your PC says 1GB = 1.073741824 Billion bytes where Market Defines 1 GB = 1.00 Billion bytes. Please Google “ssd real capacity” to get more information. About Speed: different test softwares will get different speed, speed will be affected by many different factors, our datas only as reference. Package List: (Send by your choose). 990 PRO SSD x 1.