I received my replacement CP850PFCLCD from CyberPower today.
When AC power is lost, the fan emits a slight "whirr" or "buzz" to it, but it's hardly loud -- sounds like your average 72mm (maybe smaller) fan. I will admit it would drive me crazy if it was running 24x7x365, but for short periods when the power is lost, it's very
So yep, I just got a lemon the first time around.
Making life hard for others since 1977.
I speak for myself and not my employer/affiliates of my employer.