Chirping/squeaking coming from PC

https://reddit.com/link/1pghkyk/video/c0e8003r2s5g1/player

So i've recently got this chirping sound coming from my PSU (99% sure it's the psu) and it only comes in loading screens/menu scrolling in games, when PC is just idling or im scrolling the web.. Does not occur when benchmarking CPU or GPU. Any clue what could cause it? PSU is Asus 850W TUF Gaming Gold.