Upgrade your desktop's performance with the Crucial CT4G4DFS8266 4GB DDR4 2666MHz CL19 DIMM memory module. Engineered for high-speed processing, this single stick of RAM is designed to enhance your system's capability, ensuring smooth multitasking and efficient performance. With a total capacity of 4GB and a bus speed of PC4-21300 (DDR4-2666), you can expect rapid data transfer and a boost in overall speed. The module is built with ECC memory and Fully Buffered technology, providing reliability and advanced error detection to keep your system stable during intense computations or gaming sessions.