The Apacer AU04GGB26CQTBGH is a 4 GB DDR4 SDRAM module designed to provide reliable memory expansion for your desktop PC. Operating at a frequency of 2666 MHz with a nominal speed of PC4-21300, this 288-pin DIMM helps your system handle daily tasks more smoothly by ensuring efficient data flow. This unbuffered, non-ECC memory operates at a low voltage of 1.2 V, which helps reduce power consumption and heat generation within your case. With a CAS latency of CL19, it offers a stable balance of performance and efficiency, making it a practical choice for users looking to maintain or slightly upgrade their computer's multitasking capabilities.