Coil whine is a thin, high-pitched whistle or buzz that you hear from a graphics card, a power supply or a motherboard. It bothers many people, and the honest truth is this: it is not dangerous, it does not always go away, and manufacturers usually do not treat it as a defect. Here is how to understand it and what can be tried.
An illustration of the typical tendency, not a measurement: every card and power supply is different.
1. What it is
Inductors (chokes) in the power circuits carry a rapidly changing current. The magnetic field makes the part vibrate a little, and at some frequencies the vibration is audible, like a quiet whistle. The sound depends on the load, not on the temperature: it appears when the card draws sharply changing current, for example at very high FPS in menus and loading screens. It does not mean that the part is failing, and it does not shorten its life.
2. Is it really coil whine?
| What you hear | Most likely source | How to check |
|---|---|---|
| Thin whistle that changes with FPS or with what is on screen | Coil whine of the graphics card | Cap the FPS: if the sound goes away or becomes much quieter, this is it |
| The sound appears under CPU load only (a CPU benchmark, not a game) | Motherboard or power supply | Compare a CPU-only test with a GPU-only test (stress tests) |
| Buzzing that follows the fan speed, rattles or ticks | A fan, a loose cable or a bearing | Slow the fans down or watch the sound change with the fan curve (fan guide) |
| Gurgling or whining that follows the temperature in a liquid cooler | The AIO pump | Check if the sound changes with the pump speed or temperature |
| Clicking or grinding | A hard drive | The sound is steady and independent of the graphics load |
| Buzzing with a burning smell | Power supply failing | Switch the PC off at once and bring it for diagnosis (PSU guide) |
Tip: record the sound on a phone at a fixed distance and note what you were doing at that moment. Never put your hand or a metal tool inside a running PC; listen through a paper tube from a safe distance.
3. What can help
- Limit the FPS (V-Sync, G-Sync/FreeSync with a cap, or an in-game limiter). It is the most reliable fix, because the loudest whine usually comes with several hundred FPS in menus (graphics settings guide).
- Lower the power limit or undervolt the graphics card (GPU tuning guide). The current changes, and the whine often becomes quieter or changes its pitch, although sometimes it does not help.
- Support the graphics card with a holder so that it does not hang on the slot, and check that the screws of the card and the side panel are tight. A vibrating case amplifies the sound.
- Listen with the side panel open and closed, and put the case on a hard, flat surface or on anti-vibration feet.
- Test another power supply if you can borrow one. The power supply can change how loud the noise is, but the whine often stays with the card.
- Wait a few dozen hours: some units get quieter after a break-in period, but it is not guaranteed.
- Muffle the sound with a quieter case or sound-absorbing foam: this reduces what you hear, but does not remove the source.
4. What not to do
- Do not cover the coils with glue or varnish: the card will lose its warranty and may overheat.
- Do not buy a new part only because of the whine without trying the FPS limit first.
- Do not expect that a replacement unit will be silent: each unit is different, and there is no reliable way to predict it.
5. Warranty and returns
Most manufacturers and shops treat coil whine as a characteristic of electronics and not as a defect, because the part works correctly. So it is rarely a warranty case, and the decision depends on the maker and the seller. What you can do: check the return period for your purchase, contact the seller with a short sound recording, and describe the conditions. If the sound is only audible with your ear next to the open case and at very high FPS, it is a normal level. If it is clearly heard from a metre or two at a normal FPS, it is worth talking to the seller. This is general information and not legal advice.
Quiet components are easier to choose when you know the load. Pick the parts in our PC configurator, and if the PC makes a noise that you cannot identify, contact us with a recording.