I removed the BIOS mod on my RX480, installed AMD drivers 19.4.3 and applied the strap. But I can't get more than 13MH/s out of it. Miner shows it applies the strap just fine but no results. With modified BIOS card runs 30MH/s with blockchain driver. Am I missing something to get back to the 30MH/s without a bios mod?