#Computer makes high pitched noise update

Otherwise it's probably a particularly loud electronics whine (I think it's too high-pitched to come from a fan, and too irregular to come from a disk). Try unplugging the speaker (in typical PCs there's a wire you can unplug somewhere if you have the manual for your motherboard the right wire should be easy to find). If it's a beep, it could be your motherboard telling you something, or it could be a defect in the speaker. Could you record a motherboard beep for comparison? Also a longer recording could help (is that really a second frequency at the end?).

#Computer makes high pitched noise update

Will update on the next hot day :)ДЇrom the recording I can't tell whether it's more of a beep or more of a whine.

Is there any way to find which one is it? (carefully listening doesn't work, I've tried!) Is it even worth it? Is there any way to be relatively sure it's the motherboard and not the CPU or RAM or something else?Д®DIT: I've now installed SpeedFan to see what's the temperature threshold where it starts making noise. 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.Д®DIT: 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.