8GB Kit ( 4 x 2GB Modules ) DDR3 1600 MHz ( PC3-12800 ) DDR3 SO-DIMM ( 204-Pin ) Non-ECC Unbuffered Apple Mac Certified Memory RAM Upgrade Designed For Select Apple Mac Systems: iMac (for a complete list of compatible systems, see the description section) Compatible Apple Order Numbers: MD095LL/A / MD096LL/A / ME088LL/A / ME089LL/A / MF125LL/A / MF885LL/A / MF886LL/A Compatible Apple Model IDs: iMac13,2 / iMac14,2 / iMac15,1 Compatible Apple Model Numbers/EMC: A1419 (EMC 2546) / A1419 (EMC 2639) / A1419 (EMC 2806) A-Tech provides a Lifetime Warranty for all orders & offers complimentary United States based Tech Support before, during, & after your purchase