V3.1 stable on all machines except one, which is a 7 card rig. Few minutes in one of the GPU's ( always at index 1) would report 0 sols/s, the watchdog will restart the miner, and "Desplay driver stopped working, has recovered" error pops up, and then the system just crashes.
Some people pointed out that it could be a riser issue, but I've tried isolating the faulty card by running each card on its own thread, and they work fine. Its only if I run one instance of claymore's with all 7 cards that this problem occurs. I've tried moving from modded bios to stock, different driver versions, and this keeps happening still. Any clues?
Does the problem occur if you run the rig without that card (ie as a six card rig instead of a 7)?
Have you tried swapping cards in the risers to see if it still happens in that position or does the problem follow the card?