Need Increased performance from your system? Add more memory. The Lenovo 8GB DDR4 2666MHz ECC RDIMM memory will upgrade your system's performance and enhance its ability to run more programs simultaneously. Tests prove 100% compatibility with supported systems. Editing high-resolution pictures rendering 3D graphics and playing the latest games is not a big deal with DIMM 16 GB of memory that effortlessly manages themDDR4-2666/PC4-21300 operates at an effective bus speed with minimal power consumption and as a result you get optimal computer performance with an improved memory heat dissipationNo matter how heavy and numerous the applications that you are using 2666 MHz memory speed with Registered signal will run them smoothly