Hopefully one of the resident experts here can help me with this question...
I'm sure some of you blessed (or plagued) with sensitive hearing can hear that high pitched noise that comes out of some PC power supplies or TV sets.
Any ideas as to what aspect of PSU (except for "being cheap"
![Laughing :lol:](./images/smilies/icon_lol.gif)
The HiPro 400W OEM PSU I recently got is making this noise when it is plugged in. With the mains connected to the PSU, I can hear a faint high pitched whine when I put my ear close the vent hole in the case.
The newegg comments about this PSU had a few others commenting on this noise, so I dont think it is becuase I have a lemon or a faulty PSU. It is brand new.
The PSU itself has Active Power Factor Correction, which is quite impressive to find on a cheapie OEM PSU I would think.
Could it be that active PFC PSUs, with their inductive/capacitive circuitry trying to increase the efficiency, are prone to this kind of noise.
I'd be keen to hear your experiences.
I'm particularly interested about the Aopen 450W, which I have confirmed is a Fortron FSP power supp, but has no PFC circuitry. Despite being older tech, would this still be a better PSU that the HiPro
BTW, just to clarify, I'm not talking about noisy fans or metal scrapping kind of sounds. The sound I am describing is definitely an electrical sound.
http://www.techspot.com/vb/topic2661.html
Thanks, cheers
![Smile :)](./images/smilies/icon_smile.gif)