i hace a h110 pro and i solved my problem by updating the bios, its a nice guide for beginners, thank you for your gentle work,
Hi!

Can you tell me which version of motherboard version did you had and on which on did you updated?
I connected 6 AMD cards, all are recognized but only card that is in PCI2 slot (GPU0) is minning above 14Mh that how much I can get with OC, all other cards are running areound 12 MHs. I tried to switch cards and again same situation only card that is in PCI2 slot is minning 14Mh and all other about 12 Mhs.
I tried GPUs on different motherboard and they are able to mine all of them 14MHs simultaneously.
Any advise.
Thank you!