Restored Apple A1398 MC975LL/A 15.4" MacBook Pro, Mac OS X 10.11 El Capitan, Intel Core i7-3615QM Processor, 16GB RAM, 256GB Solid State Drive (Refurbished) - Walmart.com
Macbook Pro upgrade kit for model A1398 Hardrive and Memory | eBay
Install 16GB RAM Upgrade on Macbook Pro 15" in under 5 minutes - YouTube
How to Upgrade a Mid 2012 15" MacBook Pro - New RAM - New SSD! - YouTube
16GB 2X8GB RAM Memory for Apple MacBook Pro A1398 Black Diamond Memory Module DDR3 SO-DIMM 204pin PC3-10600 1333MHz Upgrade - Walmart.com