As far as I know this is now how modern CPU work. When it receives work to do, it will overclock the hell out of the core it will use for the task to crunch the task as fast as possible, rising then lowering the temperature of the core very fast. You need to configure your fans appropriately so that they ramp up only if the temperature is above the defined threshold for more than a fraction of a second (I think my configuring program uses 5 second averages) if it’s acceptable and possible with your software, but there is another solution that I like better: configure all your fans at a fixed speed. I found that the sound change is in fact much more annoying than the actual sound. Your CPU will effectively be slightly nerfed by this (but it’s already far too powerful for anything), and the ultimate solution is to have a quick switch between fixed and curve-based fan speed to use when you know you’ll need your CPU a lot and can handle the sound.