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PSU calculated efficiency question


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Hi to all,


I have HX 850i. I noticed calculated efficiency to be most of the time 85%, with minimum 83%. The documentation said minimum is supposed to be 87%. Is something wrong with my PSU no following the documentation and it needs to RMA or replaced? Temperature is 34.5°C. Another issue is voltage fluctuation, especially 3.3v, from 3.28v to 3.296v, average, average 3.294.

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