Hey Guys if you have Claymore telling you this: Gpu1 hangs in OpenCl call,exit. this is what i did to fix it.

My Rig:

7x RX 580 8GB DUAL OC Edition on Windows 10 with Claymore 9.7
Bios Modded (only the Straps from 1750 to 2000), Crimson 17.3 Betadriver for Blockchain. 28,2MH/s /card

1. I woke up to a crashed Miner.
2. One of the GPU was giving out 0,000Mh/s, the rest was fine.
3. Windows was giving bluescreens with (Thread stuck in device driver)

well..

what i did:

1. to figure out which Card was having a hickup i unpluged one after the other until i found it.

2. took the card out of the rig, pluged a operating one in that slot.
   2.1 card worked fine in the slot that was having the problematic card in there b4 so: Its not the riser or anything behind it.

3. put the faulty card in a slot that was operating fine(just to make sure) result: still 0,000mh/s

4. unpluged all the cards that did work. left the malfunctioning one in.

5. flashed original bios back on to the card. - didnt help

6. ddu - driver uninstall. back to box driver. - didnt help

7. went and tried several settings for overclock/undervolt etc. didnt help

8. had a hissy fit. - didnt help

9. thought the card is EX at this point. pluged the hdmi cable in, works fine ( o.0)

10. run a heavy benchmarktest on the GPU, worked fine.

11. ran the Claymore again. 0,000mh/s (repeat step 8)

12. let the other 6 Cards operate for 2 days and ignore the problem.

13. took the card and installed it on a different machine that never had a rx 580 in it (fresh driver)

14. 0,000 MH/s for a minute or two with the old watchdog barking about the card hanging in openCL

15. after a minute or two: holy shit its auctually hashing at box-speed 24,4 MH/S

16. put the card back in the mining rig: fixed.

17. long story short: if DDU, new BIOS, OC settings dont fix it. Reinstall Windows or try another PC - it will fix it.

hope this helps.