some of my rigs mine 12 hours straight no issue. some after 1 hour the terminal seems lags and hashrates dropped significantly. until i close the terminal. all smooth. without restarting the ubuntu, gpu wont apply OC saying failed to applied or something and the lags begins.

tried lower down the oc on core and mem did not help. it seems like a random freeze/lags issue happening. if GPU failure the watchdog of claymore works fine. something its still hashing, just real slow because of the lags and watchdog wont kick in.

any idea?