One out of six 580's is slow and cannot be altered in Wattman

[Jonet]

Hi there!

I have a 6 GPU mining rig that has developed a problem after a few weeks of stable mining. GPU0 is showing a very low hashrate and fans off. When I check in Wattman it is running both GPU and memory at 300MHz. For this particular card all the sliders are grey, so it cannot be adjusted/overclocked.
If I swap the riser cables, it's still GPU0 that is slow even if GPU0 is now a different card. I can also see in Wattman that the card is sometimes reporting 511 deg calsius (should be 51)
Any idea what I can do to troubleshoot?

ASUS RX580 Dual OC 8 with original BIOS and no overclocking
ASUS Prime Z270-P, PCIe set to Gen1
AMD Driver 17.7.1

Problem in Claymore Ether 9.7 , 9.5 and Claymore Zcash 9.7

[Jonet]

I solved it by removing the AMD driver with DDU and reinstalling the same driver (17.7.1)