http://www.pcgamer.com/cyber-monday-ram-deals-2017/

Whether you're building a new PC or upgrading your current build, quality RAM is vital. You can get by on 8GB, but an upgrade to 16GB is definitely worth it for

gaming, and a great idea if you do any audio, video or graphics work on your PC. Now's a great time to step up your memory game on the cheap, and we'll be searching for Cyber Monday deals for as long as they last. Below are the best discounts we've found so far.

Note that you're better off getting a single kit that meets your size needs than two smaller packages with the same capacity so you don't end up with mismatched timings.