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CPU predictable noises

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August 12, 2009 6:34:28 AM

Ok this is a weird problem i've run into. Whenever i start the computer up before I go to the windows screen my computer makes a high pitch noise, when i start windows up the high pitch noise goes away and is replaced with a processing sound I guess you can call it. The weird thing is if I click back on my browser the sound will stop every time I click back. I also opened up Diablo II and in the start screen and lobby the sound would stop but as soon as I went into the game it would pick back up, but less noticeably. I'm hoping this is my cpu, which is an athlon 64x2 4200+.

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August 12, 2009 7:02:30 AM

There's no such thing as a processing sound. That might be the sound of the fans rotating inside. A high pitch noise is usually uttered by a dying PSU. Or maybe a busted cpu cooler fan. Could you give the specs/model of the PSU you're using?
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August 12, 2009 7:07:32 AM

It's an allied al-c400atx. I know it's not the fan because whenever i unplugged the fan, the sound stayed the same.
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August 12, 2009 7:14:05 AM

Must be the PSU. It's an unknown brand and its dying.
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August 12, 2009 7:30:17 AM

Yea thanks for the help i'll try to swap it out with my friends tomorrow. See if the noise stops.
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August 12, 2009 1:49:29 PM

err guys, I know for all of my systems, when in POST the fans turn on at absolute FULL and then dim down to normal after POST, and that older/crapier mobos have had fans that ran on full until OS hand off or something like that...

then again that psu seems like a no name and is dying.
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December 14, 2009 5:50:11 AM

I have the same power supply that came with my APEX SQ-328 case (<--look that up on google and see if this is, by chance, your mid-ATX case). The power supply is the Apex Allied AL-C400ATX.

The noise that the PSU makes is from the capacitors and they sound like a high pitch tinitus whining sound. Almost like an old modem sound or cicadas.

I noticed the problem about a year ago, and I took the PSU out and tweaked/glued the capacitors down; the noise went away. This week, the noise started up again due to the changing weather/barometric pressure/humidity.

It's annoying and it tells me that the filter capacitors are probably not smoothing the power. So I bought a Corsair VX450W.
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