Dear Claymore
There is a farm of 2x STRIX-RX480-8G-GAMING win10 crimson 16.11.2
So when miners including 5 and 6 version 1 video card is not detected.
2 Defined only if you add the launch of miners in the startup menu at startup. If you start miner and then close the miner and run on the new defined only 1 card.
In version 4 this happened