Computer sounds like it's wheezing for air

[MustISO]

I've got some really strange sound coming from my machine. It started about 2 weeks ago as a light "digital" ringing sound. Now it sounds like the computer is wheezing. It starts and goes for like 1.5 seconds, stops for 1 second and then starts again. Over and over. It's the strangest thing I've ever heard. I thought it was a drive or a fan but I've checked every drive and every fan. It's most audible down by the PCI slots. I have a sound card, video card, Ultra ATA card and network card all down there. Anyone ever experience something like this?

Here's the sound translated to english aaaweeeEEEEEeeoooooo, pause ,aaweeeEEEEEeeoooooo

 

[nirgis]

Is is a hard drive sound? Perhaps the cycling of the hard drive causes this.

A fan on the video card?

 

[Budman]

<< aaaweeeEEEEEeeoooooo, pause ,aaweeeEEEEEeeoooooo >>

 

[MustISO]

I checked each of the hard drives by unplugging them one by one. I did the same with the fans. It definitely coming from where the PCI cards are. Could it be some signal "leaking" from a card?

 

[Steven the Leech]

Could it be some signal "leaking" from a card?

Take the card out and see. Just use the essential components.