SANDISK Optimus™ GX PRO 850X PCIe® 4.0 NVMe™ SSD, 2TB, Read 7,300MB/s Write 6,600MB/s, 5 Yr Warranty Specifications Capacity 256GB Form Factor M.2 2280 Sequential Read Performance 2400MB/s Sequential Write Performance 900MB/s Random Read 160K IOPS Random Write 85K IOPS Interface PCIe Gen3 x4, NVMe v1.4 Warranty 5-Year Limited Warranty Endurance (TBW) 650 Dimensions (L x W x H) 80mm x 22mm x 2.38mm Weight 7.5gms Operating Temperature -40°C to 85°C Non-Operating Temperature -40°C to 95°C