I was able to OC my Patriot Viper 2133 to 3000 (4GBx2), no problem. No voltage adjustment either and it runs stable. On a Ryzen 1600 at stock, Gigabyte DS3H B350 (x370 chipset).
I'm not sure if an A320 will have as good amount of support OC'ing ram. You can give it a try, just go up small...