OWC 8GB UPGRADE: Consists of 2pcs of a 4GB DDR3 1600 PC3-12800 CL11 2Rx8 204-pin 1.5V Laptop SODIMM Memory Module. 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.