I’m not really sure if it is the GPU but it started making this noise,
View: https://imgur.com/a/3ZtAGHx
seems like a thing with evga cards, i looked up more about this and seems like people fixed it by setting a fan curve on afterburner and turning off 0 rpm mode off, theres a debate on wether this is normal or not but seems like the curve fixed itCould be the GPU. Set your GPU fans at a static 50% and see if the moise goes away.
Alternately, grab the inner cardboard tube from a roll of paper towels, open the side of your case, put one end of the tube to your ear, move the other end around to your different components/fans (without touching). You should be able to isolate the noise source.