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Originally Posted by skaven
Not discrediting your advice; I agree that it's probably the hard drive or something. But silicon chips *can* make noise, and my computer is a prime example. The processor (Barton 3200+) emits a high-pitched whine (I'd guess around 20kHz, barely within hearing range) that changes based on CPU load. As the CPU gets more load, the pitch lowers into a very noticeable whine and makes almost a scratchy noise. At first I thought it was the power supply (I use watercooling so there isn't a fan or anything over the CPU) but after swapping the PSU out with a brand new Antec, I get the same thing. I rolled up my mousepad to make a crude directional microphone, and was able to zero in on the waterblock.
So yeah...CPUs (and other chips) can make noise, though when they do it's most likely a sign that they're about to self-destruct. I've been patiently waiting on my barton to fry itself for about 6 months now. I'm shocked that it still works.
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It's probably the capacitors on your motherboard making that noise. The ones in my Dell laptop are especially obnoxious, and they always have been.
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