Hope someone have the idea or clue how to solve the issue I have with the mining rigs.
It’s 6 GPU ASUS 1080ti ROG Strix 11gb mining ZCash. Single card was hashing around 690-700 Sol/s and hash rate was really stable and constant. Rigs’ been working for 6 months 24/7 with no problems until a week ago or so when hash rate dropped averaging to 600 Sol/s. On one rig I.ve noticed voltage oscillations which cause sudden changes drops and rise in hashing power. See the attached screenshot from msi Afterburner and CUDA miner EWB3.4.
Any suggestions are welcome where to start looking for solution.