Need help for MacBook Mid 2012 RAM Upgrade

May 8, 2018
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I want to upgrade my device's ram to 16 GB and I am searching for RAMs. I've found this ram on web :

- Samsung 8 GB DDR3-1600 Mhz PC3L 12800 1,35v CL-11 Notebook Ram

For now, I will buy 1 piece of this and later buy another. But there is an option for to choose like this :

- 8GB 2R x 8 PC3L-12800S-11-13-F3
- 8GB 2R x 8 PC3L-12800S-11-12-F3

I've Google'd 11-XX-F3 code and I found that they need to be matched to work. MacBook Pro 2012's code is 11-11-B2. If I buy 1 of the Samsung RAM, will they work together with old 2Gb RAM?