Hissing sounds

[Aolish]

As of right now my comp is making some sort of hissing sound (NO!!! there's no snake), i checked out the inside and all seems to be fine, the sound is so faint i could hardly hear it at all when the case is opened, I can't tell where its coming from. However when i close the case the hissing sound is more louder (i guess because of the echoing?). Does anyone have any idea what component would most likely create a hissing noise? So far no problems with the comp btw) Thx in advance for all help!

 

[Heligrin]

Northbridge fan? Those things die quick.

 

[GalvanizedYankee]

Might be a ball bearing on one of the fans singing. Unplug the case fans and hear if it goes away. Stop the VGA's fan. Turn the rig off, carefully block the PSU's fan, then reboot. Is the sound gone now? The CPU's fan being stoped can send an alarm but that alarm can temporarily be turned off in most BIOS. Some bits in the PSU can give off an electronic buzz but the proper name excapes me at the moment.

Oh! Are you sure the side panel is not loose and vibrating a tad?


...Galvanized

 

[Aolish]

Heligrin: Passive cooloer

Galvanized: I'll check out your suggestions, for the vibration thats what i thought to... i always had vibrating problems for years LOL, and exactly know which ones do it and which ones dont. I held down and tightned all that i knew that vibrated. Unfortunately that didn't get rid of the hissing. I'll try out your other suggestions btw. thx.