Question Help ! Rx 570 Stuck at 1041mhz

[r.vartanyanov]

So I bought a second hand GIGABYTE Rx 570 8gb for mining purposes and I tried it in Hive OS and Windows but by default
the core clock just WON'T go above a 1041mhs which i think is the 4-th Phase/state when looking in Polaris Bios Editor

-I have tried flashing new bios - not helping
-I have tried changing the core clocks and voltages but voltage changing seems to have no effect using PolarisBiosEditor
-I have tried doing weird things like setting the lower Phases high like 1150 on Phase 2 and it shows it goes to 1150 but weirdly has NO performance impact or voltage change
-I have mentioned the voltage change because i tried going with 1250 and 950 on all phases like:
1250 950
1250 950
1250 950
1250 950
1250 950
1250 950
1250 950
1250 950

And something weird happenes, the card goes crazy to 32.40mh/s but is using 150Watts with 1150mV on the core clock and 1250 core mhz
Needless to say its pretty hot and loud and doesnt seem okay to stay like this long term.

My question is HOW can I change the voltage or clock core to go somewhere in the middle, hell im happy with 29 mh/s if I can get it because if I try to go:
1150 950
or
1200 950 (tried with 1000mV and 850mV - has no change at all)

The voltage goes back to 937mV and it doesnt matter if i set 1041 or 1200 mhs the performance is all the same (26mhs) at 89Watts
It is like i can't or dont know how to change voltage properly to go somewhere in between it goes either down to 937mV at 89W(26mh/s) or 1150mV at 150Watts(32.4mh/s)

If someone can help me i would really appreciate it!

 

[r.vartanyanov]

UPDATE: I tried something that everybody is saying NOT to do, I flashed an Asus 570 BIOS on the Gigabyte card and it KIND OF fixed the problem.

The core clock goes to 1300mhz if untouched, but If I try to undervolt it automaticallt goes down to 1156 which is State/Phase 5 or 1156mhz at 65285.

It went up to 30.55mh/s which is so much better, but there still seems to be some problem with voltage and core clock speed being weirdly paired with eachother.
Any Ideas are welcome. Thanks.