Sorry about the screenshot, I was so tired with my work, I have make a test with gigabyte hynix , no more change, Baffin models this is very nice (500H/s without OC) but not keep this hashrate for a long time hashrate drop to 300H/s, same for lexa models. For now I keep my bios (reach 480H/s no drop), waiting a update for rx550 models