Problem with one rx480 + two rx470 in my rig, windows will not reconize them

[Jerdelance]

I previously build a 6 MSI Rx470 rig, wich works wonders.
now I am building a second rig.

I plug 1 MSI rx480 8Gb, it works ok
then I plug 1 MSI rx 470 4Gb, install the drivers again, and they work ok.

But then when I plug in the second MSI RX470 all of the sudden, windows 10 will not reconize any card at all.

Then I install the drivers all over again, and windows just reconizes the Rx480.

The 2 RX470 show in the Device Manager with error and the miner won't see them.

I have tried every thing, I installed the driver 16.4, then the last 17.5, with no success.

However, if I remove 1 Rx470 both remaing cards (one 480 and one 470) work just fine. So I don't know what is going on.

Somebody please help me figure this out.
Thanks in advance.

[gloupsy]

Try DDU (clean drivers in windows safe mode) and reinstall your drivers after.
http://www.guru3d.com/files-details/display-driver-uninstaller-download.html