Boost your system’s performance with the 4GB DDR4 2666 MHz 288-Pin UDIMM Memory Module from Crucial. Delivering speeds up to 2666 MHz, this single-ranked 4GB RAM module with x8-based chips is designed to improve your computer’s start-up times, overall responsiveness, and ability to handle data-intensive applications. The module is unbuffered, features a CAS latency of 19, and and works on systems with a 288-pin DIMM slot and a DDR4-enabled chip.