Hi guys ! In first, sorry about my english :-)  (my own speaking is french)

I have two RX580 8gb nitro+ special edition, I have modified the bios, the driver installed is the crimson blockchain, I have disabled the crossfire mode in the radeon's software, I have overclocked too with MSI afterburner .. If I only use one card, the hashrate is 28 mh/s with claymore.

But,

If I use the two card in the same time in my computer, the hashrate is .. around 16 mh/s ..

https://i.goopics.net/L3qZW.jpg

I tried with claymore v 10.5 , 11.5 , 11.7 , 11.9 and it doesn't change anything...

Maybe you can know what is the problem ??

Thank you very much for your help !