Crucial 8GB Single DDR4 2133 MT/s (PC4-17000) DR x8 SODIMM 260-Pin Memory - CT8G4SFD8213 Speeds start at 2133 MT/s Increase bandwidth by up to 30% Reduce power consumption by up to 40% and extend battery life Optimized for next generation processors and platforms x8GB Based Dual Ranked Unbuffered Laptop/Notebook Memory