How to Set a Fan Curve for a Quieter Gaming PC

Your PC sounds like a hair dryer the moment a game loads, and sometimes even when you are just opening a browser. The fans ramp up, drop, then ramp up again every few seconds. In most cases the hardware is fine and the fan curve is the problem. Setting a sensible fan curve takes about 20 minutes and can make a gaming PC noticeably quieter without letting anything run hot.

This guide walks through what a fan curve is, which temperatures to watch, a starting curve you can copy, and how to test it properly.

What a fan curve actually controls

A fan curve is a simple rule: at this temperature, spin the fan at this speed. It is usually drawn as a graph with temperature along the bottom and fan speed, as a percentage, up the side. You drag a few points to shape it.

Most motherboards ship with a default curve that is either too aggressive or too twitchy. Too aggressive means fans at 70 percent while you read email. Too twitchy means they react to every one second CPU spike, which causes that annoying up and down revving.

There are usually three groups of fans to think about:

CPU cooler fan, controlled in the BIOS or motherboard software
Case fans, also on the motherboard, often linked to CPU temperature by default
GPU fans, controlled separately through the graphics driver or a tool like MSI Afterburner

Know your safe temperatures first

Before touching anything, check how hot your parts run now. Install a free monitoring tool such as HWiNFO, play a demanding game for 20 minutes, and note the maximum readings. Here are practical targets for modern hardware:

Component	Comfortable while gaming	Worth investigating
CPU (most Intel and AMD)	60 to 80C	Sustained above 90C
GPU core	60 to 80C	Sustained above 85C
GPU hotspot	Up to about 95C	Above 105C
NVMe SSD	40 to 65C	Above 75C

If your temperatures are already high with loud fans, a fan curve will not fix it. Dust, poor airflow or dried thermal paste is the real issue, and our PC cleaning routine is the place to start.

How to set a fan curve in the BIOS

Motherboard software exists, but the BIOS is the most reliable place because it works before Windows loads and does not need an app running in the background.

Restart and press Delete or F2 to enter the BIOS. Switch to advanced mode if needed.
Find the fan section. It is called Q-Fan on ASUS, Smart Fan on Gigabyte and MSI, and Fan Control on ASRock.
Select the CPU fan header and choose manual or custom mode.
Look for a setting called fan step up, step down, smoothing or response time. Set it to 3 to 5 seconds. This alone stops most of the revving.
Set the curve points from the table below.
Repeat for each case fan header. Point them at CPU temperature, or at a motherboard or system sensor if your board offers one.
Save and exit, usually with F10.

A starting fan curve to copy

This curve suits a typical midrange gaming PC with a tower air cooler. Adjust from here after testing.

CPU temperature	CPU fan speed	Case fan speed
40C and below	30 percent	30 percent
55C	40 percent	40 percent
70C	60 percent	55 percent
80C	80 percent	70 percent
90C	100 percent	100 percent

Check that 30 percent actually spins your fans. Some models stop below 20 to 25 percent, which is fine for case fans with a zero RPM feature but not for a CPU cooler.

Setting a GPU fan curve

The graphics card manages its own fans. Most modern cards keep fans off entirely below about 50 to 60C, which is good for idle silence. Under load, the default curve is often tuned for low temperatures rather than low noise.

In MSI Afterburner, open settings, go to the fan tab, enable user defined software automatic fan control, and try this shape: 0 percent up to 50C, 40 percent at 60C, 55 percent at 70C, 75 percent at 80C, and 100 percent at 85C. Keep Afterburner set to start with Windows or the curve will not apply.

If you want lower GPU temperatures without more noise, undervolting does more than any fan curve. Our guide on undervolting your GPU with MSI Afterburner covers it step by step.

Why "max fans means a healthier PC" is the wrong goal

A lot of forum advice says to run every fan at 100 percent while gaming because cooler is always better. I disagree, at least for normal gaming PCs.

Modern CPUs and GPUs are designed to run at 70 to 80C for years. Dropping a GPU from 72C to 64C by doubling fan noise gains almost nothing in performance, because the card is not throttling at 72C in the first place. You simply trade comfort and headset clarity for a number on a graph. Fans also wear faster at constant full speed, and fan bearings are one of the few parts in a PC that genuinely wear out.

The better goal is the quietest setting that keeps every part comfortably inside the safe range in your hardest game. Temperature headroom is a buffer, not a score.

Testing your new curve

Do not trust a curve until you have tested it the way you actually use the PC.

Idle test: leave the desktop for 10 minutes. Fans should be at their minimum and temperatures steady.
Gaming test: play your most demanding game for 30 minutes with HWiNFO logging. Check the maximum CPU and GPU temperatures against the table above.
Summer check: a room that is 8 to 10C warmer in summer raises component temperatures by roughly the same amount. If you are near the limit now, add 10 percent to the upper curve points.

If a part sits above its target, raise only the top two points of that curve by 10 percent and test again. Small adjustments are easier to judge than a full redraw.

Frequently asked questions

What is a good fan curve for gaming?

A good gaming fan curve keeps fans quiet around 30 to 40 percent below 55C, rises gradually to about 60 percent at 70C, and reaches full speed only near 90C. Adding a smoothing delay of 3 to 5 seconds stops the fans from revving on short spikes. Test it in your hardest game and adjust from there.

Should case fans follow CPU or GPU temperature?

Most boards link case fans to CPU temperature by default, which works for many builds. In gaming PCs where the graphics card produces most of the heat, linking case fans to a system or GPU sensor, if your board offers one, often gives better results. Fan control software can also use GPU temperature as the source.

Is it bad to run PC fans at 100 percent all the time?

It will not damage your hardware quickly, but it adds noise, collects dust faster and wears out fan bearings sooner. Most components run happily at 70 to 80C, so constant full speed rarely improves performance. A tuned curve is quieter and just as safe.