Hi all, my mining rig is back to life after 2 years...

Hardware:
ASRock H110 Pro BTC+ (Bios 1.60)
2 x Corsair HX1000
6 x Radeon RX 580 8GB (modded Bios)
6 x Radeon RX 470 4GB (modded Bios)

Software:
Windows 10 20H2 19042.685 (the latest)
AMD Radeon Software Adrenalin 2020 Edition 20.12.1
PhoenixMiner 5.4c
ATIkmdag-patcher 1.4.9

Settings:
64GB Allocated Memory in Windows 10 (PheonixMiner asks to allocate minimum 42GB+ for 12 cards, I allocated 64GB).
All cards RX 470 & RX 580 are modded (bios) + atikmdag-patcher for drivers.
AMD Radeon software -> every card has been switched from 'Graphics' to "Compute" mode.

I am running 12 cards at the moment and everything is stable but I have VERY LOW hashrate on all RX 470 4GB between 6-9MH/s.
I restored original bioses on all RX 470's and run miner without RX 580's - hashrate was 8MH/s on all cards.

Is it time for selling RX 470 4GB cards, or am I doing something wrong??

https://i.imgur.com/TW7Qigq.png
https://i.imgur.com/9uCF2a3.png