hello i bought 6x rx 570 nitro + 4gb eplida gpu last week.

i was mining it with stock bios and i was getting max 22.2 mh on eth

but on some forums i found a modded bios for overclock  and now i am getting about 29-30 Mh per card.

i dont know if this really normal for these cards or i am lucky?

also after updating that bios i am getting less temp and less vol on card .

please respond with your queries is that good to continue with this bios or is it harmful?