A lot of the time it can happen if you're rendering a ridiculous number of frames. I used to get it in game menus where the FPS would spike into the hundreds. Other than that, just general high load will do it.
The noise comes from inductors in the GPU core power supply. Under the right load conditions, the coil in the inductor begins to resonate. The magnetic fields change so rapidly and contain so much energy that they physically push the coil until it resonates at some small fraction of the switching frequency. It's a pretty neat, if extraordinarily annoying phenomenon
The noise comes from inductors in the GPU core power supply. Under the right load conditions, the coil in the inductor begins to resonate. The magnetic fields change so rapidly and contain so much energy that they physically push the coil until it resonates at some small fraction of the switching frequency. It's a pretty neat, if extraordinarily annoying phenomenon