Gunlock

Hey guys.

I've noticed a really annoying thing with my PC.

Its pretty damn silent most of the time (Yay for P182), but whenever i game the computer starts to make a deep humming noise. It sounds like a fan, but the only fan i dont have control over is the PSU fan.

The noise has only started since i OC'd the cpu. Could oc'ing the CPU made the psu fan spin faster as it needs to draw more power?

If im right in that assumption, can anyone recommend me a good, silent, modular, PSU?

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WannaBeNoob

some computers will indeed spin up to higher RPM when they run hotter or need mroe power.

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el gappo

could be a capacitor crying because it has to do work, mine used to then it went bang like a few months later.

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Gunlock

Thats kinda worrying considering its only ~ 4 months old

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Axxess+

Most likely your CPU fan. It's normal.
Or it may be your PSU fan, as when a PSU has more load it creates more heat.

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We Are The Red Tide

Paradigm Shifter

This. With the CPU overclocked, it'll be loading the PSU harder, making it run warmer. Chances are it just tips the temps over the 'fan speed up' threshold.

When capacitors do odd stuff, it's usually squealing... not humming. Trust me, if caps start to squeal you'll know it - cuts right through everything else. The caps on some nVidia cards and motherboards squealed under load. Sometimes there will be some feedback down the 12v lines from the GPUs into the PSU causing that to squeal. You can watch it with an oscilloscope - quite pretty, but not something you want to see down a 12v line.

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Andru

It could be your graphics card's fan speeding up because of the heat.

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We Are Gr33n Machine

the_beast

Open the case & have a listen to make sure what it is. Unless you can pinpoint the problem it's really hard to work out what to do about it.

If you really have ~90cfm going through your cpu heatsink at full load that will make a hell of a racket. Similarly, you will be pushing your psu quite hard with an OC'ed 65nm quad, so it might be ramping up to compensate. Or your gpu when gaming hard.

You should be able to tell quite easily which of the above the noise is coming from with the side off. Then you can try and work out what to do about it (it might be as simple as turning up the speakers ).