A-Tech 8GB (2x4GB) RAM for Apple MacBook Pro (Early/Late 2011), iMac (Mid 2010, Mid 2011, Late 2011), Mac Mini (Mid 2011) | DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory Upgrade Kit at Amazon.com
Samsung ram Memory 16GB kit (2 x 8GB) DDR3 PC3L-12800,1600MHz, 204 PIN SODIMM for laptops at Amazon.com
Samsung Original 16GB, (2 x 8GB) 240-pin DIMM, DDR3 PC3-12800, Desktop Memory Module at Amazon.com
Corsair CMK8GX4M1A2400C14 Vengeance LPX 8GB (1 x 8GB) DDR4 DRAM 2400MHz (PC4-19200) Memory Kit - Black at Amazon.com