hello,
I have 2 rigs where the GPU 1 still don't mine ETH :/
W10, latest AMD drivers, 4Go GPU, -eres 0.
Problem is, on the opposite of claymore, phoenix reboot the miner automatically instead of having GPU 1 at 0 hashrate and letting the rest mine.
normallyall my rigs have the same configuration, I don't know why it works better on somme than on other.