Ryzen 2700x Fatal1ty X370 Gaming X

The 2700 and 2700x are supported from BIOS version 4.60 onwards.

As for RAM, your best option if you want to upgrade is getting a 32gb kit (2x16gb). If that is not an option you will want to get the same model as you already have for the second kit. Even then, there is a chance you will have stability/performance issues (not able to run at the same frequency as 2 modules did). Do not mix brands, while there is a slim chance it could work there is a much higher likelihood it will not.

Honestly, it depends on what you do with the system and how good of a deal you can get on the 2700x. I have not bothered upgrading my 1600x because 6 cores and 12 threads at 4.1ghz demolishes every task I throw at it. Even using the system at stock clocks things are more than snappy enough for my needs.

That said, if you are performing heavily threaded tasks and time is important to you then the 2700x is a significant upgrade, particularly with hugely threaded applications.

By your post I am guessing you are using this system as a work horse, 32gb of RAM and a 2700x makes for a beastly productivity machine. If you are just looking at gaming and basic daily tasks however, save your money for a better GPU, or, if you already have a good one, a second one for crossfire/SLI. You will see much more return performance wise (gaming) for your money.