Here is your Asus Motherboard Specs: https://www.asus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-a520m-plus-ii/techsp...
Memory:
4 x DIMM, Max. 128GB, DDR4 4866(OC)/4800(OC)/4600(OC)/4466(OC)/4400(OC)/4266(OC)/4133(OC)/4000(OC)/3866(OC)/3733(OC)/3600(OC)/3466(OC)/3333(OC)/3200/3000/2800/2666/2400/2133 MHz, Un-buffered Memory*
Dual Channel Memory Architecture
*ECC Memory (ECC mode) support varies by CPU.
*Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists), and memory frequency support depends on the CPU types.
Here is your Asus Motherboard QVL LIST FOR RAM for the 5000 series processors: https://www.asus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-a520m-plus-ii/helpde...
I suggest you purchase a set of 2 x 16GB@3600Mhz RAM since 3600Mhz is the "Sweet Spot" or best Performance Memory speed for both the 3000 & 5000 series processors.