Modified GPU BIOS for Mining

[FP91G]

Thanks for for your answer, but my memory is hynix 4 and not supported on polarisbioseditor 1.7.5 ...

Polaris Bios Editor v3PRO
SRBPolaris V3.5
Polaris Bios Editor v3PRO this is a paid version, but there are free versions on the net
I looked at the reviews, but the professional version already contains collections of memory timings for each mining mode. In the free version, you need to find the timings yourself.
Try these 2 programs, I am sure you will solve your problem.

[Looper_U]

There is no use modding bios for few hashrates more because using HiveOS will give you the best settings for the card no matter how stubborn it may seems, I used to have a Micron memory Rx 580 GPU that always gives me 27Mh per second no matter what I tried but on hiveOS using lowest mV as possible I achieved achieved 32MH with ease

[FP91G]

where i can to download Polaris Bios Editor v3PRO ?

Official site
https://mining-bios.eu/product/polaris-bios-editor-3-pro-pbe-3-pro-performance-timings/

But you don't have to buy this program, ask Sergocosss for help on another forum. Write to him in English.
https://miningclub.info/threads/polaris-bios-editor-3-pro-2020-pbe-3-pro-performance-timings.75984/post-2005548

Or ask for help here
https://bitcointalk.org/index.php?topic=1954245.1040