A-Tech 16GB (2x8GB) RAM for Apple MacBook Pro (Early/Late 2011), iMac (Mid 2010 27 inch 4-Core, Mid 2011 21.5/27 inch), Mac Mini (Mid 2011) | DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory Upgrade Kit at Amazon.com
Apple MacBook Pro 15 (Early 2011) review: Apple MacBook Pro 15 (Early 2011) - CNET
Apple MacBook Pro A1278 (Early 2011) 13"-Core i7, 2.7GHz 8GB RAM, 750GB HDD - Apple Force
Apple MacBook Pro 15-inch Early 2011 2GHz Intel Core i7 (MC721LL/A) – UNICOM, Inc.
Is my Macbook Pro 2011 limited edition? - Apple Community