POLARIS BIOS EDITOR FAQ BIOS MOD

What GPUs can you mod with PBE

What GPUs can you mod with PBE - click to expand

You can mod pretty much 99% of AMD GPUs with Polaris architecture.
That means RX460, RX470, RX480, RX550, RX560, RX570, RX580, RX590
With 2GB, 4GB or 8GB memory, there are some with 16GB that aren't supported (https://github.com/IndeedMiners/PolarisBiosEditor/issues/10)

Can you mod RX5700, RX6700, RX6800, Vega etc? - click to expand

NOPE

How to save bios from your GPU card - click to expand

Download the latest ATIWinflash and run it as Administrator - https://www.techpowerup.com/download/ati-atiflash/
Pick your card and save the bios with (*.rom)

**Always keep your stock bios file saved!**

How to mod bios with PolarisBiosEditor - click to expand

Download the latest version of PBE or build on your own - https://github.com/IndeedMiners/PolarisBiosEditor/releases
Start the Polarisbioseditor.exe
Click on "OPEN BIOS" and find your save bios from ATIFLASH
Once you load the bios you can simply hit the "ONE CLICK TIMING PATCH" button. It will apply appropriate timings for your GPU card or ask if you want this timing or not. If it ask for timing to be applied or not, I suggest you to click on "Yes" and try mining with that. If the performance of the card is not as expected, then load the stock bios again and instead of clicking on "Yes" when it ask click on "No" and it will apply second timing.
After that you can save your modded bios file. Never overwrite your stock bios file! Always keep your stock bios file saved!
This is pretty much everything you need to do in PBE. You can change clocks and voltages, but you can do that in Afterburner or other utilities.

I do not recommend changing voltages from dynamical values (65286) to static values (950)

How to flash modded bios to your GPU- click to expand

Run the latest ATIWinflash as Administrator
Pick your card
Load bios
Click program. Your PC will freeze for few seconds so patiently wait!
It's recommended to wipe drivers with DDU (with reboot), you may do it even twice - https://www.guru3d.com/files-details/display-driver-uninstaller-download.html
After reboot install the latest AMD drivers or drivers recommended by the miner you use. Do not install those old (2017) Blockchain drivers!
You will probably need apply ATI Pixel Patch, rename the file to "atikmdag-patcher-bios.exe" first to only patch signature - https://www.monitortests.com/forum/Thread-AMD-ATI-Pixel-Clock-Patcher
Switch cards to compute workload - https://www.amd.com/en/support/kb/faq/dh-024
Reboot
Make sure you don't have any OC enabled, run all cards witch stock values and start miner to see if it's working good
After that you can start to tweak core and memory clocks also voltages

My card is unstable when mining - click to expand

You probably have too high memory clocks
If you use Windows, simply download HWINFO and check if your card has memory errors - https://www.hwinfo.com/download/