Rx 470 4gb OC settings

Hi! im currently getting 12.5MH/s and im wondering if i can get it to 13. its an msi armor OC edition and the person i bought it from said they bios modded it. these are my overclocks: 75% fan 1150 core 900 vdd and 2000 mem. wondering if i can get it higher on RVN. also its running at 55C