Strange GPU noise

Hello everyone!

I have MSI Aero ITX GTX1050 and in past two weeks i noticed some strange noise that comes from gpu (it sounds like fan is spining faster, but it doesnt, fan keeps normal, constant speed). That noise appears only when gpu utilisation is low, when pc is idle on destkop, but whenever i open any program/game noise disapears. GPU performs whell, temps are normal, 30-35 celsius idle, 65 on full load. Do you know what it can be?

Thanks!