Don't get the wrong idea. Fast RAM for AMD chips does make a difference, especially for the APUs, where the man memory is shared with the graphics.
For current AMD CPUs and APUs (Cpu + Gpu), DDR4-3200 to 3600 is the current sweet spot for price/performance.

My only point was that, when it comes to the fps drops in PvP and OPs, RAM speed isn't going to make enough difference to even be noticeable. 🙂