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Problem rig 3 GPU 1070 HASH - 50% (SOLVED)

Hi guys,
I updated a few minutes ago to version 0.6-21 and I saw an excessive drop in my hash, from 54 to 42. But what seems strange to me is that the GPUs 1,2 and 3 now do not exceed 2,200. OC setting is Core 135, MEM 0, PL 120, FAN 60 and temperatures are below 40 degrees.
I have read that the Fidelity has improved and therefore even if the GPS are inferior in reality the production is greater … but because 3 GPUs are blocked at 2,200 and before they were all between 3,600 3 4,200?

Driver Nvidia Update