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??

It is time to retire 4GB cards. ETH DAG size is already 4.023GB so there is no room in the GPU mem for the DAG to be loaded. There were some ways to limp on for a few more days but I think they have passed now. Time to put them out to pasture.. or better yet try and sell them..