RX 570 4gb – Can’t get more than 10mhs avg per card (with oc and bios mod)

So, title says pretty much everything.

Is there any way I can reach at least 12mhs with each card on hiveos? My OC settings are core 1120 and memory 2050, and I already BIOS modded all 6 of them.

The ones with the SK Hynix memory are the ones with the lower mh, even down to 9.5.

The ones with the Samsung memory sometimes reach 11mhs, but that's it.