motherboard isnt really great, on msi qvl fastest ram supported are 2400MHz, so either that ot it hasnt been update for really long time
anyway heres what amd officialy supports on ryzen1/2 series
2933MHz on 4 layered PCB mobo
3200mhz on 6 layered PCB mobo
your mobo has only 2 PCB layers so that 2400mhz could be real deal here
going higher than supported speed is all about mobo and luck