OWC 16GB DDR3L 1600MHz PC3L-12800 CL 11 1.35V 204pin Laptop DIMM memory compatible with Lenovo ThinkPad models W550s, X250 and Yoga 460. 100% COMPLIANT: With JEDEC-Standard specifications, ROHS Compliant, Warranty Safe Upgrade. Designed and Tested to Meet or Exceed all Manufacturer OEM Specs. INCREASED PERFORMANCE: Memory Upgrades are the Most Effective and Easy Way to Boost your PC's Performance INDUSTRY LEADING: Consumer-friendly Advanced Replacement Program and Limited Lifetime Warranty, which includes Free Tech Support by Other World Computing. EASY INSTALLATION: In Most Cases Installing Memory is an Easy DIY project. Watch our OWC Basic Installation Video for help.