CPU temperature is the reading from sensors inside your processor, and the number that matters is how close it gets to the chip's own maximum. A desktop processor usually sits between 30 and 50 °C at idle and between 60 and 85 °C under a heavy load. Thin laptops and some high end desktop chips run at 90 to 100 °C under load by design. To check yours, install a free monitor such as HWiNFO or Core Temp, then load the processor with the cpu stress test for five minutes and watch the highest reading. If it reaches the limit for your chip within a minute, or the computer slows down or switches off, the cooling needs attention.
Quick checks
- Know your processor. In Windows 11, open Settings, System, About, and read Processor. On a Mac, choose About This Mac from the Apple menu.
- Read under load, not at a glance. A single high reading means little. Run a five minute load and watch the steady value.
- Look at the fans. On a desktop, check through the side panel that the processor cooler's fan spins under load.
- Allow for the room. Every degree warmer in the room adds roughly a degree to the processor.
Normal CPU temperature range
These are typical readings for a computer in good order, in a room at about 20 to 25 °C.
| What the computer is doing | Desktop | Laptop |
|---|---|---|
| Idle, desktop showing | 30 to 50 °C (86 to 122 °F) | 40 to 60 °C (104 to 140 °F) |
| Gaming | 60 to 80 °C (140 to 176 °F) | 70 to 95 °C (158 to 203 °F) |
| Stress test on every core | 60 to 85 °C (140 to 185 °F), up to the chip's limit on some high end models | 80 to 100 °C (176 to 212 °F) |
A processor that reaches its maximum slows down to stay there, which is called thermal throttling. It switches the computer off if the temperature keeps rising. So a high reading is not dangerous in itself, but a processor that sits at its limit is giving away speed.
Maximum CPU temperature by processor
Each maker publishes a maximum for every model. Intel lists it on the product specifications page as TJUNCTION or Max Operating Temperature, and AMD as Max. Operating Temperature (Tjmax). Some current examples:
| Processor family | Example model | Maximum |
|---|---|---|
| Intel Core 14th gen desktop | Core i9-14900K | 100 °C (212 °F) |
| Intel Core Ultra 200S desktop | Core Ultra 9 285K | 105 °C (221 °F) |
| Intel Core Ultra series 1 laptop | Core Ultra 7 155H | 110 °C (230 °F) |
| Intel Core Ultra 200V laptop | Core Ultra 7 258V | 100 °C (212 °F) |
| AMD Ryzen 9000 desktop | Ryzen 9 9950X | 95 °C (203 °F) |
| AMD Ryzen 7000 X3D desktop | Ryzen 7 7800X3D | 89 °C (192 °F) |
| AMD Ryzen 5000 desktop | Ryzen 7 5800X | 90 °C (194 °F) |
| AMD Ryzen AI 300 laptop | Ryzen AI 9 HX 370 | 100 °C (212 °F) |
AMD has said its Ryzen 7000 desktop chips are designed to run at up to 95 °C under heavy load, so a reading of 95 °C in a stress test is expected on those. X3D models such as the 7800X3D have a lower limit of 89 °C. Apple does not publish temperature limits for its M series chips. For any other processor, search its model name on Intel's or AMD's product pages.
How to check CPU temperature on Windows 11 and 10
Task Manager shows the temperature of a separate graphics card on its Performance tab, but it does not show the processor's. Use one of these free tools:
- HWiNFO. Start it in Sensors-only mode. Read CPU Package on Intel processors and CPU (Tctl/Tdie) on AMD. The Maximum column keeps the highest value since you opened it, which is ideal while a stress test runs.
- Core Temp. Shows each core and the processor's Tj. Max, so you can see the gap at a glance.
- The NVIDIA app. Its statistics overlay, switched on with Alt + R in a game, shows CPU temperature as well as GPU temperature in recent versions.
- AMD Ryzen Master for Ryzen desktop processors. It also helps when AMD Software shows no CPU temperature in its metrics.
- The BIOS or UEFI. The hardware monitor page shows the temperature at idle during start up, with no software installed.
Early Ryzen models, such as the Ryzen 7 1800X and Ryzen 7 2700X, add a fixed offset of 10 or 20 °C to the Tctl reading that controls the fans. Read Tdie on those for the true temperature.
How to check CPU temperature on a Mac
macOS has no temperature readout. Apple silicon Macs report thermal pressure instead, which says how hard the Mac is working to stay cool. Open Terminal and run sudo powermetrics --samplers thermal: Nominal is normal, and Moderate or Heavy means the Mac is slowing down to cool itself. On Intel Macs, sudo powermetrics --samplers smc lists the CPU die temperature. Free menu bar apps such as Stats show the sensors continuously.
If Activity Monitor shows kernel_task using a lot of CPU, that is the Mac cooling itself. Apple explains that kernel_task holds back other processes when the chip gets too hot. Look for the app actually using the processor.
On Linux, the sensors command from the lm-sensors package lists the processor's temperatures.
CPU temperature too high on a desktop
- Check the cooler's fan and cable. The cooler's fan should be plugged into the header marked CPU_FAN. On a liquid cooler, the pump goes on the pump or AIO header and must be running.
- Check the cooler's base. New coolers ship with a plastic film over the contact plate, and a cooler fitted with the film still on runs very hot. The cooler must also sit evenly, with each screw tightened a few turns at a time in a cross pattern.
- Clean out the dust. Clean the cooler fins, the fans and the case dust filters. Dust packs into fins and can add several degrees.
- Replace old thermal paste on a cooler that is several years old. Wipe the old paste off both surfaces with isopropyl on a lint-free cloth, then apply a small amount in the center of the processor.
- Improve case airflow. Fans at the front should pull air in, and fans at the rear and top should push it out.
- Check the BIOS settings. Many motherboards raise power limits by default for benchmark results. Loading the BIOS's default or Intel's default power profile lowers heat on Intel desktops. On Ryzen, ECO Mode in Ryzen Master or the BIOS caps the power and drops temperatures sharply for a small loss in speed. Keep the BIOS up to date, especially on Intel 13th and 14th gen desktop chips, which received Intel microcode fixes for instability.
On a laptop, the causes and fixes differ: see laptop overheating fix.
CPU temperature while gaming
Most games load a few cores rather than all of them, so the processor runs cooler in games than in a stress test. Readings between 60 and 80 °C are typical on a desktop and 70 to 95 °C on a laptop. If your processor is hotter in games than in the stress test, the graphics card is heating the case: check the gpu temperature check guide and the case airflow. Capping the frame rate in the game lowers the work the processor does and its temperature with it.
Temperature jumping up and down
Modern processors boost single cores for fractions of a second, so readings can jump by 10 to 20 °C and drop straight back. That is normal. Watch the average over a minute rather than the peak. If the fans rev up and down with every spike, add a step up or smoothing time to the processor fan's curve in the BIOS, so the fans react to sustained heat only.
CPU fan or over temperature errors at start up
A message such as CPU Fan Error with Press F1 to continue means the motherboard reads 0 RPM on the CPU fan header. Usually the fan is plugged into a different header, or a liquid cooler's pump is on the CPU header while its fans are elsewhere. Move the cooler fan to CPU_FAN. Only set the header's warning to Ignore if a liquid cooler's pump is monitored on its own header. A CPU over temperature error means the motherboard saw a dangerous reading at start up: check that the cooler is mounted and its pump runs before using the computer.
When it is a hardware fault
Temperatures that climb to the limit within seconds of starting a load point to a cooler that is not working: a liquid cooler's pump that has stopped, a cooler not touching the processor, or on a laptop, a failed fan or heat pipe. A pump that has failed often still lets the fans spin, so check its speed in HWiNFO. Processors rarely fail from heat, because they throttle and switch off first. If the stress test reports calculation errors at normal temperatures, the problem is stability, which the stress test page covers. Coolers and pumps have their own warranties, often longer than the computer's, so check with the cooler's maker before buying a new one. To test memory as well, run the ram test.
CPU temperature questions
What is a normal CPU temperature?
At idle, 30 to 50 °C on a desktop and 40 to 60 °C on a laptop. Under a heavy load, 60 to 85 °C on a desktop with a good cooler and 80 to 100 °C on many laptops. What matters most is the distance to your processor's own maximum, which is 89 to 110 °C on current chips.
Is 90 °C too hot for a CPU?
Not on its own. Laptops and recent high end desktop chips are built to run near 90 to 100 °C under full load, and they slow themselves down before any harm is done. On a desktop with a large cooler, 90 °C in games is high and worth fixing, usually with a cooler that is better mounted, cleaner or bigger.
What CPU temperature is too high while gaming?
On a desktop, consistently over 85 °C in games suggests the cooling is struggling, unless your processor is one designed to run up to its limit, such as recent Ryzen chips. On a laptop, 90 to 95 °C in games is common. Treat stutters, shutdowns and readings at the processor's maximum as too high.
How do I check my CPU temperature without software?
Restart into the BIOS or UEFI settings and look for a hardware monitor or PC health page. It shows the temperature while the processor sits idle at start up, so it cannot tell you how hot it gets under load. For that you need a monitoring app.
Why is my CPU temperature jumping up and down?
Modern processors boost single cores for fractions of a second, so readings can leap by 10 to 20 °C and drop straight back. That is normal. Look at the average over a minute, and if the fans rev with each spike, add a step up time to the fan curve in the BIOS.