Weird issue with 7 470s, they're all detected on windows and msiafterburner, no overclocks yet.
Driver 16.9.2 patched. Psu 1600w, motherboard asrock pro btc 2. Already mined with 7 cards to test before, one of them was a R9 Fury and no issues.

It starts detecting them and says "AMD cards available 7"
https://image.prntscr.com/image/766cfbbbd93244fa96716c4641f3aff6.png


But then it says "total cards: 6"

https://image.prntscr.com/image/6c8f1e9e56c64eab8b7637958b55da87.png

And only six cards are mining.

Anyone knows why and how to fix this?