Can't say I have noticed any high pitch noise either, don't know if it makes any difference but remember reading before about monitor speakers and this being a problem, so my monitor speakers have always been turned off and disabled in the sound device settings.
My screen still sometimes splits on the right side but it is very rare and everything else is as it should be so I'm happy enough especially for the price, could pay twice the money for what will be more or less the same screen on the whole and still encounter problems, particularly with bleed and dead pixels.
We just need cost affordable OLED monitors to arrive already, LCD on the whole is just embarrassingly bad when compared with it.