![]() ![]() I've read ( here, here) that it can be some electronic component in the motherboard gone bad. There is no crashing or freezing or anything abnormal when it screeches like this but it's quite annoying during summer. I'm also sure it's not the PSU, as I've changed it and it's still screeching.ĮDIT: it's definitely not a digital beep, it's an analog whine. it occurs when the computer is idle, with and without high I/O activity, with and without high CPU usage. The noise doesn't seem to be related to any particular activity, i.e. ![]() This noise comes in short bursts (up to 3 seconds long) and the occurrence frequency is unpredictable. For the last 2 years, on hot days only (28C (82F) or more) it makes a high-pitched, quite loud, and very annoying noise. ![]()
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