Powercolor 570 red dragon and red devil can’t work together?

[MingMining]

Hi guys,

So here is the problem. I have modded these two cards, one by one, using Anorak's bios. Patched both after modded. Tested on Calymore's dual miner, worked perfectly. Both cpu-z and afterburner can recognize them. BUT, when I put them together, while device manager still show two cards with no issue, afterbuner can only show one of them with right information. The other one is recognized but all information are zero. When i started Claymore's dual miner, it said "EthDcrMiner64.exe has stopped working" and exited. I tried all different pci-e slots, installed and uninstalled many times. I even installed a clean win 10 x64. Nothing works. Separated, they work perfectly. Together, miner did not work at all. Before I modded them, I put them in the same box and they work with 21 m hashrate but stable. Now they did not even start...

When claymore's dula miner stopped working, it did not really recognize the cards. Both card are 4GB but the miner read as 3GB for each.

The rom i am using:

Anoraks_Powercolor RX 570 RedDragon 4GB Hynix Elpida_memshift-1500.rom106 (256 KB)

and

Anoraks_Powercolor RX 570 RedDevil 4GB Hynix-Elpida_memshift.rom39 (256 KB)

Please help. I am out of ideas how to do with them now.

Thanks.

[MingMining]

Update: Turned out its my bios setting. I should set the memory mapping to enabled. When disabling this feature, my 6G system memory can only be seen as 2G thus the error.