Just built a new PC and everything seems to be running smoothly except for this incredibly annoying and headache inducing sound. No components are under strain as I’ve literally done nothing but turn on the computer. I tried to pinpoint where it’s coming from, thought maybe it was the psu from reading about coil whine. Pulled it out and listened to it, definitely not coming from there. Took out the gpu also and still the sound is there. Unplugged speakers, still there. This sounds nothing like a buzz or vibration either, just a straight up frequency. All of the parts are brand new and straight out of the box so it wouldn’t be a case of something being too old. Any ideas anyone??