Radeon RX580

[Erium]

Hello all. Today I built two rigs for mining ETH with Nanopool:

Gigabyte GA-Z170X Motherboard
Windows 10
Five Sapphire Nitro+ RX580.

Both have same issue:

GPU0 5Mh/s
GPU1 22 Mh/s
GPU2 22 Mh/s
GPU3 22 Mh/s
GPU4 22 Mh/s

How can I put GPU0 at 22 Mh/s like others?
Is it possible to increase from 22 Mh/s to a better Mh/s?
Any other pool better that Nanopool?

Thank you all.

[Ultegra134]

What driver version are you using? Does GPU0 have the monitor installed on it, do you have Crossfire enabled on the drivers?If yes, disable it. Also, what PSU are you using?

[RazerBoy]

Go and check out my thread, https://bitcointalk.org/index.php?topic=2237432.0. I got my babies to 28.5 on ETH and 860 on DCR. But I'm now trying to get it to at least 29.5 with 900 DCR. But 30.5 would be perfect. So come and help me out if you can !