16GB (4 x 4GB) PC8500 DDR3 1066MHz SO-DIMMs Memory RAM Upgrade Compatible with iMac 21.5" and 27" October/2009 () - OWC 8566DDR3S16S

• UPC   812437020649
• OWC 16.0GB UPGRADE: Consists of FOUR 4GB DDR3 1066MHz PC3-8500 CL7 SO-DIMMs 1.5V 204-pin Memory Module Compatible with Mac and PC 100% COMPLIANT: With JEDEC Standard Specifications, ROHS Compliant, Warranty Safe Upgrade. Designed and Tested to Meet or Exceed All MAC Specifications for iMac and PC Laptops COMPATIBLE WITH: Mac systems: iMac 27-inch (Late 2009 Model ID: iMac10,1 and iMac11,1) iMac 21.5-inch (Late 2009 Model ID: iMac10,1) COMPATIBLE PART NUMBERS: 661-5309, 661-5595, 661-5227, 661-5210, 661-5489, 661-5309, 661-5646, 661-6348, 661-6175, 661-6174, 661-5482, 661-5035, 661-4988, 661-5454, KTA-MB1066/4G, CT4G3S1067M, CT2C4G3S1067M, CT51264BC1067 INCREASED PERFORMANCE: Memory Upgrades are the Most Effective and Easy Way to Boost the Performance in Your Mac or PC INDUSTRY LEADING: Consumer Friendly Advanced Replacement Program and Limited Lifetime Warranty, which Includes Free Tech Support by Other World Computing