RX 570 8gb LOW RATIO/ ACCEPTED RATIO

Hi!,
I have an issue with my rx570 8gb samsung K4G80325FB, tried every oc possible and nothing seem to stabilize it,
I get high load average (arround 2.8) and the accepted ratio start to increase, can’t get it down
Also tried bios mod with polaris (3 mods) and every possible oc variant and nothing
If anyone has any idea what might be happening, it would be very helpful!!

image

It says rx 580, but is a mistake, its rx 570 8gb

My Asrock RX 570 8GB does 29.30Mh without bios modding only the OC.
i get very rarely some invalid shares but i think its due to internet.
so the OC is like this :

Core clock 1112
Core voltage 812
Memory controller voltage 800
Memory clock 2190
Fan 50%
Aggressive undervolting switched on
amdmemtweak -REF 200

with these settings i get 29.29 MH/s 90W power consumption - 50temp