I changed my case(Zalman Z9 plus) and my Power Suppply (Corsair HX520) yesterday buy I have a problem my cpu fan is running at 4300 RPM and it's really noisy. Before I changerd my case and PSU it was very quiet I would like to know why is it so noisy now and how can i reduce the speed of it.(Speed fans is not working with my MotherBoard)
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Check your CPU temps. Also check the heatsink is seated properly (it may have been bumped out of place).