How to compare gaming PC fan curves by noise

Your gaming PC gets louder during a match, but you are not sure whether a different fan curve would help. A fair comparison means testing each curve from the same spot, under the same workload, while checking that the PC still stays cool.

The Noise Meter can show how the sound level changes at your normal listening position. Treat its decibel reading as a comparison, not as a laboratory measurement, and pay attention to how the sound feels as well as the number.

Compare the fan curves

Open the Noise Meter on a device with a microphone. Allow microphone access when your browser asks. Set the microphone at your usual seated ear position, and keep it there for every test.
Choose the first fan curve in your PC's firmware or fan-control utility. Write down which curve it is and any fan speeds or temperature targets you can see. Do not change other cooling or power settings during the comparison.
Run the same game scene, repeatable benchmark, or other consistent workload each time. Let it run for about five minutes, or until the fans and temperatures settle. Keep the room, case position, game settings, and workload as similar as possible.
Watch the Noise Meter for about 30 seconds and note the typical reading and how much it moves. Also note what you hear: a steady whoosh, a high-pitched whine, or fans that repeatedly speed up and slow down.
Repeat the test with the next fan curve. If possible, switch back to the first curve and test it once more. This helps show whether a change came from the curve or from a different game load or room sound.

If the browser cannot use the microphone, check the permission icon beside the address bar. On Windows 11, also check Settings › Privacy & security › Microphone. On macOS, check System Settings › Privacy & Security › Microphone. Use the same microphone for all readings, since different microphones can report different levels.

What the results mean

The reading is lower and temperatures remain acceptable

This curve may be quieter for your setup. Check temperatures with the same monitoring method you normally use, and make sure the game does not slow down, stutter, or trigger a thermal warning. A lower noise reading is not a good trade if the processor or graphics card becomes too hot.

The reading is similar, but one curve sounds more annoying

Decibels describe sound level, but they do not fully describe sound quality. A narrow high-pitched tone, a rough vibration, or a repeating ramp in fan speed can be irritating even when the displayed number is close. Record your listening impression along with each reading.

The reading jumps around

The game may be changing its load, the fans may be reacting to temperature, or background sounds may be reaching the microphone. Repeat the comparison with a steadier workload and wait for the fan behavior to settle. Keep people, music, and other noise sources away from the test area if you can.

The quieter curve lets temperatures rise sharply

Do not choose it just because it sounds better. Raise the fan response or return to the previous curve, then test again. The right balance depends on the components, case airflow, room temperature, and the type of games you play.

Adjust a curve without risking overheating

Find the control your PC provides. Fan curves are usually set in the motherboard's UEFI or BIOS, or in the computer maker's or motherboard maker's fan-control utility. Windows 11 does not have one universal fan-curve menu, so the available controls depend on your PC.
Change one part of the curve at a time. Make a small adjustment to a fan's response at a particular temperature, rather than changing every fan and temperature point together. This makes it easier to tell which change affected noise or cooling.
Keep essential cooling active. Do not turn off a CPU, graphics card, or case fan just to reduce noise. If your system supports a zero-speed mode, use it only within the manufacturer's recommended temperature limits.
Repeat the same workload test. Keep the microphone in place and use the same game scene and settings. Compare both the noise reading and component temperatures before keeping the new curve.
Check a longer gaming session. A short test may miss heat building up inside the case. Play for 20 to 30 minutes and check for rising temperatures, performance drops, warning messages, or fans that keep surging.

Why the listening position matters

A fan curve is not the only thing that determines what you hear. The case may sit under a desk, beside a wall, or on a hard surface that reflects sound. A microphone placed next to the case can make small fan changes look large, while a microphone across the room may hide sounds you hear clearly at your desk.

For a useful comparison, place the microphone where your head normally is while gaming and keep its distance and angle fixed. A phone or separate computer on a stand can make this easier than using a microphone mounted on the gaming PC. The Noise Meter uses that device's microphone, so its readings are best used to compare your own tests in the same setup, not to compare your room with someone else's.

Keep the fan curve that stays within safe temperatures and sounds comfortable from your seat during the games you actually play.