Rig:
Asrock B85 Anniversary
Intel G1840
some Kingston RAM 4Gb...
Kingston SSD V300
HIS Radeon RX 480 IceQX 2 8Gb x 5
powered by Seasonic X1250 PSU
Windows 10 64 bit
I used Claymore Dual Miner and each GPU could perform 24.7 Mh/s on stock freq/voltage. I wanted more, so I decided to modify BIOS settings.
Since I couldn't find ready modified ROM for these GPUs I tried to edit it myself.
I saved original BIOS with GPU-Z, then opened it in Polaris BIOS Editor, made some changes (which I noticed in Boysie modified ROM for RX 480 Nitro) and tried to flash it as per this instruction:
Was it necessary to remove ATI drivers before flashing? Because I haven't done this (since I've already had the latest drivers), flashing went without errors, but I got a black screen after reboot...
Only one card was plugged during flashing.
I thought I could add an other GPU with stock ROM, start Windows and flash the original BIOS, but if this card with non-original ROM is plugged I always get black screen and can't start Windows. I'll try to start Windows in safe mode, but I guess I've already tried it with no success.
Is there any way to get it back to work?
Asrock B85 Anniversary
Intel G1840
some Kingston RAM 4Gb...
Kingston SSD V300
HIS Radeon RX 480 IceQX 2 8Gb x 5
powered by Seasonic X1250 PSU
Windows 10 64 bit
I used Claymore Dual Miner and each GPU could perform 24.7 Mh/s on stock freq/voltage. I wanted more, so I decided to modify BIOS settings.
Since I couldn't find ready modified ROM for these GPUs I tried to edit it myself.
I saved original BIOS with GPU-Z, then opened it in Polaris BIOS Editor, made some changes (which I noticed in Boysie modified ROM for RX 480 Nitro) and tried to flash it as per this instruction:
1. Start off in Windows with Stock BIOS, Stock Settings, no undervolt/overclock.
2. Reboot to safe mode and run DDU to safely remove all video drivers.
3. Reboot into Windows and download the latest drivers from AMD (Someone said the latest version of drivers cause higher wattage usage, I think this might be the case since I'm at 1050 watts for an 8GB RX480 rig, but I will have to do more testing to figure it out)
4. Install drivers and reboot.
5. Once Windows comes back up you should have all your cards seen in Device Manager and all should be good. If you have more than 4 cards you might have to run the 6GPU fix to get the other working. Don't move on to the next step until you've got all working in Device Manager.
6. Download the latest version of Atiflash
NOTE: Sometimes it's a good idea to flash 1 card at a time. If you want to do this, shutdown your rig, unplug all RX 480s except 1 and boot back up, repeating the below process to flash eash GPU.
7. Open a command line, as administrator, and browse to the Atiflash folder. Type atiflash -i to list the GPU or GPUs you have connected. Once the first one will be "0", then 1,2 and so on if you have more than 1 connected.
8. If you are comfortable with the GPUs that are connected, you can now flash the BIOS by typing "atiflash -f -p 0 BIOS.rom" without the quotes, where "0" is the number of the GPU you want to flash and "BIOS.rom" is the name of the ROM you want to flash to the card. It will give you some info on what it is doing and then take a minute or 2 to flash. When it is done, it will prompt you to reboot to make the changes take effect. You can proceed with flashing the other cards before rebooting, or at least that worked for me.
9. Once all your cards have been flashed with the new BIOS and are seen by Windows with no errors, you can move on to step 10
2. Reboot to safe mode and run DDU to safely remove all video drivers.
3. Reboot into Windows and download the latest drivers from AMD (Someone said the latest version of drivers cause higher wattage usage, I think this might be the case since I'm at 1050 watts for an 8GB RX480 rig, but I will have to do more testing to figure it out)
4. Install drivers and reboot.
5. Once Windows comes back up you should have all your cards seen in Device Manager and all should be good. If you have more than 4 cards you might have to run the 6GPU fix to get the other working. Don't move on to the next step until you've got all working in Device Manager.
6. Download the latest version of Atiflash
NOTE: Sometimes it's a good idea to flash 1 card at a time. If you want to do this, shutdown your rig, unplug all RX 480s except 1 and boot back up, repeating the below process to flash eash GPU.
7. Open a command line, as administrator, and browse to the Atiflash folder. Type atiflash -i to list the GPU or GPUs you have connected. Once the first one will be "0", then 1,2 and so on if you have more than 1 connected.
8. If you are comfortable with the GPUs that are connected, you can now flash the BIOS by typing "atiflash -f -p 0 BIOS.rom" without the quotes, where "0" is the number of the GPU you want to flash and "BIOS.rom" is the name of the ROM you want to flash to the card. It will give you some info on what it is doing and then take a minute or 2 to flash. When it is done, it will prompt you to reboot to make the changes take effect. You can proceed with flashing the other cards before rebooting, or at least that worked for me.
9. Once all your cards have been flashed with the new BIOS and are seen by Windows with no errors, you can move on to step 10
Was it necessary to remove ATI drivers before flashing? Because I haven't done this (since I've already had the latest drivers), flashing went without errors, but I got a black screen after reboot...
Only one card was plugged during flashing.
I thought I could add an other GPU with stock ROM, start Windows and flash the original BIOS, but if this card with non-original ROM is plugged I always get black screen and can't start Windows. I'll try to start Windows in safe mode, but I guess I've already tried it with no success.
Is there any way to get it back to work?