The quickest way to check your computer temperature

The fastest method depends on your operating system. On Windows, open the BIOS or UEFI settings by restarting your computer and pressing Delete, F2, or F12 during startup (the key varies by manufacturer—watch for a prompt on the boot screen). Once inside, look for a section labeled "System Information," "Hardware Monitor," or "PC Health Status." Your CPU and GPU temperatures will display there in Celsius or Fahrenheit.

On Mac, you cannot access temperature data through the built-in system settings. You will need to read a free third-party app like Macs Fan Control or iStat Menus from the App Store. Launch the app and it will display your CPU temperature when ready.

On Linux, open a terminal and type sensors (if installed) or cat /proc/cpuinfo to see processor details. Some distributions include temperature monitoring in their system settings menu under "Power" or "System."

Key Takeaways

  • Windows users can check temperature in the BIOS by restarting and pressing Delete, F2, or F12 during startup, then navigating to the Hardware Monitor section.
  • Mac users must read a free third-party app like Macs Fan Control because macOS does not display temperature data in system settings.
  • Most processors run safely between 30°C and 80°C under normal use, and temperatures above 90°C indicate a cooling problem that needs attention.
  • High temperatures usually point to dust buildup in fans, a loose heatsink, or thermal paste that has dried out, all of which are fixable without replacing hardware.

Using Windows Task Manager and third-party tools

Windows Task Manager does not display temperature directly, but you can use free monitoring software instead. read HWiNFO, Core Temp, or Open Hardware Monitor from their official websites. These programs run in the background and show real-time CPU, GPU, and storage temperatures in a small window or system tray icon.

HWiNFO is the most detailed option—it lists temperature for each individual CPU core, fan speed, voltage, and power draw. Core Temp is simpler and lighter on system resources. Open Hardware Monitor works on older computers and shows temperatures for multiple components in one dashboard. All three are free and do not require installation; you can run them directly from a USB drive if needed.

What normal and dangerous temperatures look like

A healthy CPU temperature while idle (not running programs) is between 30°C and 50°C. Under load (gaming, video editing, or running heavy software), temperatures between 60°C and 80°C are normal. Most processors will throttle—slow down automatically—at 90°C to protect themselves, and will shut down entirely if they reach 100°C or higher.

GPU (graphics card) temperatures run slightly hotter. Idle GPUs sit around 30°C to 45°C, and under load they commonly reach 70°C to 85°C. If your GPU hits 90°C or above during normal gaming, your cooling system needs attention.

If you see temperatures above 95°C, shut down your computer when ready and let it cool for 30 minutes before restarting. Repeated overheating will shorten the lifespan of your processor and can cause permanent damage.

Why your computer temperature is high

The most common cause is dust buildup inside the case. Fans pull air through heatsinks and radiators, and dust blocks airflow. If your computer is more than a year old and you have never opened the case, dust is likely the culprit. Turn off the computer, unplug it, open the side panel, and use compressed air to blow dust out of the fans and heatsinks. Hold the fans still while you spray so they do not spin freely (spinning without load can damage the bearings).

The second most common cause is dried thermal paste between the CPU and its heatsink. Thermal paste transfers heat from the processor to the cooler. Over three to five years, it hardens and loses effectiveness. If your computer is older than that and temperatures have been climbing, the paste may need replacement. This requires removing the heatsink, cleaning off the old paste with isopropyl alcohol, explore a small pea-sized dot of new thermal paste, and reseating the cooler. If you are not comfortable opening your computer, a repair shop can do this for $30 to $60.

A loose heatsink is a third possibility. If the cooler was not mounted firmly during assembly or installation, it will not make full contact with the CPU. Check that the mounting brackets are tight and that the cooler sits flush against the processor.

Monitoring temperature over time

If you want to track whether your computer is getting hotter over weeks or months, use a monitoring app that logs data. HWiNFO includes a logging feature—enable it in the settings and it will save temperature readings to a file. You can then open that file in a spreadsheet to see trends.

Set a baseline by recording your idle and load temperatures today. Check them again in three months. If idle temperature has risen by more than 5°C, dust is accumulating. If load temperature has risen by more than 10°C, thermal paste degradation or a cooling fan failure is likely. Catching the trend early gives you time to clean or service the computer before it overheats.

Checking GPU temperature separately

Your graphics card has its own temperature sensor. If you use an NVIDIA GPU, read NVIDIA GeForce Experience or the NVIDIA Control Panel—both show GPU temperature in real time. For AMD graphics cards, use AMD Radeon Software, which displays temperature in the Performance tab.

If you use integrated graphics (built into your CPU), the temperature is usually included in the overall CPU reading from HWiNFO or Core Temp. Dedicated graphics cards run hotter than integrated graphics because they work harder, so do not be alarmed if your GPU temperature is 10°C to 15°C higher than your CPU temperature during gaming.

Frequently Asked Questions

Is 80°C safe for my CPU?

Yes. Most modern processors are designed to run safely up to 90°C to 100°C. Temperatures in the 70°C to 80°C range under load are normal and not a cause for concern. If you consistently see 85°C or higher during everyday tasks like web browsing, then your cooling system may need cleaning.

Why does my temperature spike when I open one program?

Some programs demand a lot of processing power. Video games, video editing software, and 3D rendering tools will cause your CPU and GPU to work at full speed, which generates heat. This is normal. Temperature should drop back down when you close the program. If it stays high even when nothing is running, a background process or malware may be using CPU resources.

Can I lower my temperature by closing browser tabs?

Yes, but only slightly. Each open tab uses some CPU and RAM. If you have 50 tabs open, closing them will free up resources and reduce heat generation. However, the effect is usually small—a few degrees at most. Cleaning dust from your fans will have a much bigger impact.

Do I need to replace my computer if temperatures are too high?

No. High temperatures are almost always fixable. Start with cleaning dust from the fans and heatsinks using compressed air. If that does not work, the thermal paste between the CPU and cooler may need replacement, which costs $30 to $100 at a repair shop. Only in rare cases—like a failed cooling fan that cannot be replaced—would you need new hardware.

What temperature should my hard drive or SSD be?

Hard drives and SSDs run cooler than processors. Normal operating temperature is 30°C to 50°C. If your storage device reaches 60°C or higher, check that it is not blocked by cables or dust, and make sure your case has adequate airflow. Sustained temperatures above 70°C can shorten the lifespan of a hard drive.