I've had this power supply for around 7 months.
My system is as follows:
Z390 Aorus Pro WIFI
Intel i7 9700K
EVGA Geforce RTX3080Ti FTW Ultra
EVGA Supernova 850GA
 
When I run a benchmark or play a game that puts heavy load on the GPU (maybe CPU?) the power supply makes a very loud buzzing sound.
The moment the benchmark is done and the GPU isn't under load anymore it immediately stops.
Under normal usage the buzzing is not there, only under load.
 
The forum won't let me attach a Youtube link or video for some reason.
 
The video can be found on Youtube by simply typing IMG3619 in the search
 
Is this normal?