How loud is a power supply fan supposed to be?

I had a new power supply installed in my HP Pavilion desktop system. The old one I couldn't hear operating even when sitting next to the tower (except when it started to go and made revving noises). The new one sounds much louder, I can still hear it if I go into another room. I'd like to know if this is... show more I had a new power supply installed in my HP Pavilion desktop system. The old one I couldn't hear operating even when sitting next to the tower (except when it started to go and made revving noises). The new one sounds much louder, I can still hear it if I go into another room. I'd like to know if this is normal?
4 answers 4