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Hash dropped 2 times on RX580 1

Hash dropped 2 times on RX580. For several days now. I just noticed it now. Help please
The cards are not working at full capacity

the drops are normale, the efficientie here is lower than 10% low hashrate high power.
the drops comes from the cards powerlines.

this are refference cards ( thats teel the driver ) or nog goog configured BIOS.
Al brands are Reference AMD, and not all cards use reference powerlines :s