Sapphire Pulse Radeon RX 5600 XT - BIOS Flashing (P25Q80H eeprom)

[nuka02]

Hi,

I have 6 Sapphire Pulse Radeon RX 5600 XT (Base Edition) GPUs which were used for mining. When I got them they had a modded bios installed (BITBY.RU-MODBIOS). After I stopped mining they have been sitting in my drawer and I would like to sell them now. I cleaned them physically (also changed thermal pads and paste) and I would also like to install the original BIOS.

Here is the thing, on 2 of 6 cards I flashed the bios with no problems. I used amdvbflash 2.93 (last version supporting force flash), and the weird thing for me was that it had worked on some cards but not on all of them.

I figured out that the cards have different EEPROM chips. The GD25Q80C ones worked just fine on 2.93 version, while the P25Q80H ones do not. The test shows fail and it is recognized as SOC15 SPI.

amdvbflash (2.93):

amdvbflash (3.04):

I am not able to flash the bios using newer versions of amdvbflash because of SSID mismatch and they do not support the -f command.

I have also tried modding the original BIOS and changing it's SSID to match the one on the GPU but then the system does not boot at all. I recovered them using a second GPU to boot, and then flashed the previous (modded) one back on the bricked GPU.

These cards do not have a dual bios. At this point, I believe that the only option is buying a bios programmer like CH341A and try with that.

Do you guys have better ideas?

 

[VuurVOS]

Hi,

I have 6 Sapphire Pulse Radeon RX 5600 XT (Base Edition) GPUs which were used for mining. When I got them they had a modded bios installed (BITBY.RU-MODBIOS). After I stopped mining they have been sitting in my drawer and I would like to sell them now. I cleaned them physically (also changed thermal pads and paste) and I would also like to install the original BIOS.

Here is the thing, on 2 of 6 cards I flashed the bios with no problems. I used amdvbflash 2.93 (last version supporting force flash), and the weird thing for me was that it had worked on some cards but not on all of them.

I figured out that the cards have different EEPROM chips. The GD25Q80C ones worked just fine on 2.93 version, while the P25Q80H ones do not. The test shows fail and it is recognized as SOC15 SPI.

amdvbflash (2.93):
View attachment 383681
amdvbflash (3.04):
View attachment 383682

I am not able to flash the bios using newer versions of amdvbflash because of SSID mismatch and they do not support the -f command.

I have also tried modding the original BIOS and changing it's SSID to match the one on the GPU but then the system does not boot at all. I recovered them using a second GPU to boot, and then flashed the previous (modded) one back on the bricked GPU.

These cards do not have a dual bios. At this point, I believe that the only option is buying a bios programmer like CH341A and try with that.

Do you guys have better ideas?

Does the bios share the orginal part number? If yes, then you can still use a newer version of AMDVBFlash.
If the part number is different, you must use CH341A v1.7 programmer. Dont buy the black version!

 

[nuka02]

Does the bios share the orginal part number? If yes, then you can still use a newer version of AMDVBFlash.
If the part number is different, you must use CH341A v1.7 programmer. Dont buy the black version!

They do not share the same model number. The BITBY (modded) bios shows ASRock as a subvendor as well, so my guess is that they modded their bios and installed it on these Sapphire GPUs.

Can you please lmk why should I not buy the black version? Just curious about the difference.