guys third gpu shows 0, any ideas? thanks
That is GPU 0 that is showing 0.00 hash.
Probably need to watch miner output when it starts to see error message why its not hashing.
Is gpu0 a 4gb rx580? Also is your driver anywhere near current?
Windows uses some of the memory of the first video card for some reason (linux does not suffer this).
Post up what the miner is showing when spinning up and any error message it is showing about gpu0.