That sounds like your PSU fan, or something like that. Possibly GPU card fan? It's possible on case fans or CPU fans too...
A lot of products have settings where if it hits a certain threshold temp it goes to full tilt 100% until the temps drop back down. Most CPU, PSU and GPU fans do this... so my guess is it's that first. Secondly, could be a case fan, which you can go into the BIOS and use the fan speed controller to adjust those. There is a curve programed into your BIOS (I put it there
) for fan speed that steps up fan speed with temps, the curve was slightly aggressive (meaning I wanted it to be reasonably low speed and quiet most of the time) so it goes up steep. If you go in and look you'll see what I mean. You can cap the limit on 80% or something, instead of 100%, or even raise the threshold temp another degree or two higher... that should make it much less severe (if it's the case fans).
The CPU fan speed controller is basically the same way (and solution) But for PSU and GPU cards I am afraid you are probably stuck with the setting the MFG put in place.
My guess is first it's either a GPU fan, PSU Fan, or CPU fan. Next step is to figure out which. If it is CPU you can change, if it's the others it might be tougher. Some you can mod, but it's not a supported thing like changing a setting in the BIOS on the fan speed controller.
Hope that helps! Let me know a little more info if you find out something, I am sure there is an easy solution.