Lexar 4GB DDR4 2666MHz Desktop Memory – 4GB capacity desktop RAM module with 2666MHz speed and 3200Mbps performance, 288-pin interface, CAS latency CL22, and operates at 1.2V for energy efficiency, Supports operating temperatures from -20°C to 85°C on the surface and storage temperatures ranging from -55°C to 100°C, limited lifetime warranty.