How to FIX & RE-Flash BIOS of Bricked GPU on RX 470 / 480 Series
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Have you bricked your RX 470 or RX 480 because of bad BIOS or the flashing went wrong? In this tutorial, I am going to show you how to fix the bricked GPU by restoring the original BIOS and then to flash again a modded version.
A few days ago, I was helping a friend to flash a modified BIOS on two Sapphire Nitro+ RX 480 8GB OC for a better mining hashrate on Ethereum, and not only. The thing is that flashing the BIOS on the first card went perfect, but for the second card, we spent like 3-4 extra hours to figure what is wrong with it. We followed the same steps like we did with the first GPU (same steps I am showing in my tutorial).
What really happen? Well.. the flashing went well with no errors, but after the restart, we got a strange blue or black screen.. after few more restarts had the same results and at that point, i knew that there was something wrong with BIOS.
For the first GPU, I used 1500 timings (copied to 1625, 1750 and 2000), which went great, hitting around 30 Mh/s on Ethereum.
As for the second GPU I used the same timings on the first try but went bad, then I tested with 1625 timings copied to 1750 and 2000, getting 27-28 Mh/s on Ethereum (unstable).
How I recovered the broken BIOS? What I did to re-flash again the BIOS for few times until I found the best combination?
If this happens to you, no worries, you will get the GPU back up and running in a matter of minutes.
Here is how to fix bricked GPU BIOS on Sapphire Nitro+ RX 470 & 480
CAUTION:
Alway backup BIOS before any modification
Always use ATIflash to backup BIOS
Always use Polaris Bios Editor to modify BIOS
Recommended tools:
- Sapphire Trixx http://www.sapphiretech.com/catapage_tech.asp?cataid=291&lang=eng
- ATIFlash 2.74 https://www.techpowerup.com/download/ati-atiflash/
- Polaris Bios Editor https://github.com/caa82437/PolarisBiosEditor
- GPU-Z https://www.techpowerup.com/download/techpowerup-gpu-z/
I hope you did not flash the ORIGINAL BIOS and before that, you switched the BIOS jumper to “silent” position, to HDMI ports side. Also, I hope you created a backup of both BIOS versions!
- Shutdown your PC
- Switch the jumper back to original position (OC version)
- Turn on the PC
- Wait for full PC boot
- Switch the BIOS jumper to the “silent” position, to the HDMI/Display Port cables side (yes is safe to switch the BIOS while the system is running, it is meant to work like that)
- Start ATIflash as Administrator
- Flash the original BIOS ROM that you backup-ed before to modify it
- Reboot, that’s it
Once you complete this steps, your GPU should be running with no problems.. feel free to flash a different modded BIOS version with different timings, like I did.
In the end the card was faulty, maybe from the manufacturer and was replaced.
Hope this was helpful! Good luck!
