I've had this new Sapphire 7850 for about a month now and I finally decided to download MSI Afterburner and do some light OC'ing. When playing around with the fan speeds I noticed from around 45%-70% fan speed the fan(s) make a very annoying grinding noise. It is at its loudest / most annoying around 55% fan speed. Is this normal? Or should I send it back? Note: I can't hear the fan grinding noise below 45% or above 70%
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Double check that there aren't any cables inside the case that could be touching the fan.