What are your cards and what are the OC and power values?
Have you tried zec with dstm ZM miner ?
What is your nvOC version?
Hello! I have 10 gtx1070 and 3 1060. It runs before 1 month without problems. about 5500 sol
I had vers. 1.3 with ZM miner and after this problem i tried 1.4 with ZM and EBWF miner! no chance - same problem
Power 1060 - 90 watt
Power 1070 - 130 watt
Overclock on ZEC core +100 mem +600