I installed a Cooler Master Hyper 212 Evo on my Gigabyte GA-Z77X-UD5H. Obviously the fan is bigger than the stock fan and spins slower at low temps. When my desktop comes up the fan drops to about 650 RPM and my PC speaker starts beeping continuously. If I run something that utilizes the CPU and thus causes the fan to spin faster the beeping stops. It starts as soon as the fan slows back down. I went into my BIOS and disabled the CPU fan warning but it is making no difference. It is still beeping. I don't see anything wrong. My temps are good. The fan speed is adjusting with demand as it should. The PC speaker just won't stop beeping at low RPM's. It's like the option to disable the warning simply isn't working. If I disable fan speed control the issue goes away but the fan runs full speed the whole time. Any suggestions would be appreciated.