OWC 16GB UPGRADE: Consists of a single 16GB DDR5 5200 PC5-41600 CL42 1Rx8 262-pin 1.1V SODIMM Memory RAM Module Upgrade compatible with Lenovo IdeaCentre model AIO 27IRH9. 100% COMPLIANT: JEDEC-Standard and 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.