Computer Making Strange Noises
An unusual sound coming from inside the computer case — beeping, buzzing, grinding, rattling, or a high-pitched whine — that wasn't there before or has gotten noticeably worse.
Quick answer: The type of noise matters a lot: beeping on startup usually points to a specific hardware fault flagged by the motherboard, buzzing or coil whine is often harmless (though annoying), and grinding or clicking from inside the case is more serious and often drive-related. Identifying which category the noise falls into is the useful first step.
Likely causes
- Beep codes on startup — a specific pattern that indicates a hardware fault the motherboard has detected (RAM, graphics card, or similar)
- Coil whine — a high-pitched noise from the graphics card or power supply under load, which is common and usually harmless
- A fan that's failing, has a loose blade, or has debris caught in it, causing rattling or grinding
- A failing hard drive making clicking or grinding noise — see the dedicated guide if this is the source
What you can safely check yourself
- If there's beeping on startup, count the pattern (number and length of beeps) — this can be looked up against your motherboard brand's beep code chart
- Try to localise the noise to a specific fan (case, CPU, graphics card) or the drive itself
- Check nothing loose (a cable, a screw) is rattling against a fan blade
If the noise is a repetitive clicking or grinding specifically from the drive rather than a fan, treat that as a possible drive failure — see Hard Drive Making a Clicking Noise for what to do.
When it needs a proper look
Beep codes on startup and any noise that's clearly from the drive both warrant a proper look. Fan noise alone is usually safe to keep using briefly, but worth addressing before it leads to overheating.