Apacer EL.04G2V.KNH 4GB DDR4 2666MHz Desktop Memory - 4GB DDR4 RAM module operating at 2666MHz with a CAS latency of 19 (CL19), 288-pin DIMM form factor and runs at 1.2V for power efficiency. Designed for desktops, compatible with most systems supporting DDR4, including Intel 100 & 200 series platforms. Supports transfer speeds up to 2,133 Mbps and offers reliable, power-saving operation with a 3-year warranty