https://pcpartpicker.com/list/m8BQBZhttps://dlcdnets.asus.com/pub/ASUS/...mory-QVL-Ryzen-2nd--Generation-processors.pdf
^Motherboard QVL.
Take a look at 'Support Speed with Ryzen™ 2nd GenerationProcessors' in red, and the number of dimm slots.
Tighter timings would also better.