The Kingston ValueRAM 4GB DDR4 SDRAM Memory Module is a high - performance memory solution that enhances your computer's capabilities. With a memory speed of 2666 MHz and a capacity of 4 GB (1 x 4GB), this unbuffered DIMM module is perfect for running multiple applications simultaneously without lag. It features a 288 - pin interface that synchronizes electrical and clock signals for efficient data transfer, ensuring that your system operates at peak performance. The CL19 CAS latency allows for faster clock cycles, providing quick access to data and information. This memory module is ideal for users looking to boost their system's efficiency and reliability.