i have 2x SAPPHIRE NITRO + Radeon RX 470 4GB GDDR5 OC and motherboard GA-B85-HD3 ,and using Crimson ReLive Edition 17.2.1driver i add the 2 cards on it without crossfire, when start my pc the 2 cards up and when windows start the second card stop working, i am using the 1st card to connect to my screen and i will use the pc for gaming and mining ethereum, so how can i use the 1st card when playing and use the 2 cards when mining, plz i am search for along time.
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