Question Power Supply CLicking under hgh load!?

Jan 2, 2020
My Power supply is clicking but only when I am actually running a game. I can watch tv and play low load games and it will be fine, but as soon as I run something like Subnautica on full specs or Assassin's Creed Odyssey it starts to make a really annoying clicking noise. the fans speed up and that is when I hear it. It doesnt sound electrical. it actually sounded like something hitting a fan but I couldnt see anything like that anywhere in the whole case. I even opened up the PSU to get a look and nothing was obstructing the fan, although whe I shook it a little bit there was a clicking, almost like something was loose. Anyways, any ideas on how to fix this? Also, is there a way to test just the psu putting it on an intense lod outside of the compuyter to verify that it is indeed the PSU? Thank you!

CPU: i9-9900k
Motherboard: ASUS ROG Maximus XI Formula
RAM: Trident Z 3600
GPU: RTX 2080 Super
SSD: Samsung EVO 970 1T
PSU: EVGA Supernova 1000W G1+