The reason that those options might fix it is, Windows' Power-Managerment, is by default, set to Balanced, in which case it will adjust frequency and voltage thousands of times a second, and sometimes, with certain C-states, it will actually stop powering certain CPU cores, at least partially or nearly entirely.
This high-frequency swinging and loading on the VRMs, can sometimes cause "coil whine", either on the mobo VRMs, the GPU's VRMs, or the PSU.
Setting the power plan to "High Performance", locks the Power Management at "full on" settings for the CPU, and disabling C-states disables the ability of Windows or the BIOS from shutting down cores.
Edit: And honestly, the amount of extra power those settings costs, is not a whole lot. Most modern CPUs are very power-efficient anyways. You may find that those settings (recommended for DAW workstations), make your PC seem a tad more responsive as well.