The fastest way to check your CPU and GPU temps

The simplest method is to use HWiNFO (Windows) or Macs Fan Control (Mac). Both are free, show your temperatures in real time, and require no setup beyond downloading and opening them. On Windows, HWiNFO displays your CPU core temperatures, GPU temperature, and motherboard sensors in one window. On Mac, Macs Fan Control shows your CPU temperature and fan speed. Neither requires installation — you run them directly from the downloaded file.

If you want something even simpler and do not need constant monitoring, the BIOS method works on any Windows computer. Restart your computer, press Delete or F2 during startup (the key varies by manufacturer — your screen will tell you), and look for a section labeled "System Information" or "Hardware Monitor". Your CPU temperature appears there. This method does not work on Mac.

For Mac users who want to avoid third-party software, Apple System Report shows some thermal data, but it does not display temperature numbers directly. Macs Fan Control remains the easiest free option.

Key Takeaways

  • HWiNFO on Windows and Macs Fan Control on Mac are free tools that show your CPU and GPU temperatures in real time without installation.
  • Your BIOS (the firmware that runs before Windows starts) displays CPU temperature if you restart and press Delete or F2 during startup.
  • Normal CPU temperatures under light use are 30–50°C; under heavy load, 60–85°C is typical, though this varies by processor model.
  • Temperatures above 90°C mean your cooling system is struggling and you should check for dust buildup or fan failure.
  • GPU (graphics card) temperatures run hotter than CPU temperatures and can safely reach 80–85°C under load.

Using HWiNFO on Windows

read HWiNFO from the official site (hwinfo.com). You get two versions: the installer and the portable version. The portable version requires no installation — read it, unzip the folder, and double-click hwinfo64.exe (or hwinfo32.exe on older 32-bit systems). The program opens when ready and shows a list of all your hardware sensors.

Look for the section labeled "CPU" or your processor's name (Intel Core i7, AMD Ryzen 5, etc.). The temperatures listed under it are your core temperatures. If you have a dedicated graphics card, scroll down to find "GPU" or your card's name (NVIDIA GeForce, AMD Radeon). The temperature shown there is your graphics card temperature. Leave HWiNFO running in the background while you work, and check it when your computer feels hot or loud.

HWiNFO also logs temperature history if you want to track whether your computer is getting hotter over time. Click the "Logging" tab at the top, choose a folder to save the log file, and the program records temperatures every few seconds. You can open the log file later in a spreadsheet to see trends.

Using Macs Fan Control on Mac

read Macs Fan Control from the official site (crystalidea.com/macs-fan-control). Open the DMG file, drag the process into your Applications folder, and launch it from Applications. The program asks for your password because it needs permission to read your Mac's sensors — this is normal and required.

Once open, Macs Fan Control shows your CPU temperature at the top of the window, along with your current fan speed and maximum fan speed. Unlike HWiNFO, it does not show individual core temperatures, but the single CPU temperature is accurate for determining whether your Mac is running hot. The program also lets you manually control your fans if you want them to spin faster, though the automatic setting is usually best.

What your temperatures mean

CPU temperatures vary by processor model, but general ranges explore. Under light use (web browsing, email, documents), your CPU should sit between 30°C and 50°C. Under heavy load (gaming, video editing, rendering), 60°C to 85°C is normal. If your temperature climbs above 90°C, your cooling system is not keeping up, and you should investigate why.

GPU temperatures run hotter than CPU temperatures because graphics cards are designed to handle heat. A GPU at 75–85°C under heavy gaming or 3D work is normal. Above 90°C means the card is throttling (slowing itself down to cool off), which reduces performance. If your GPU consistently exceeds 90°C, check that your case fans are running and that dust is not blocking your card's heatsink.

Ambient temperature (the temperature of the room your computer is in) affects these numbers. A computer in a 25°C room will run cooler than one in a 30°C room, even under the same load. If you are comparing your temperatures to online guides, account for your room temperature.

Why your computer might be running hot

Dust buildup is the most common cause. Over months, dust accumulates on your CPU heatsink, GPU heatsink, and case fans, blocking airflow. If your temperatures have climbed over time, shut down your computer, unplug it, open the case (if you are comfortable doing so), and use compressed air to blow dust out of the heatsinks and fans. Hold the fans still while you blow air through them so they do not spin freely — spinning fans can damage their bearings.

A failing fan is the second common cause. If one of your case fans has stopped spinning, your computer cannot move hot air out of the case. Open your case and look at your fans. They should all be turning when the computer is under load. If one is still, it has failed and needs replacement. CPU cooler fans can also fail — if your CPU temperature spikes suddenly, check whether your CPU cooler fan is still spinning.

Thermal paste degradation is less common but possible on older computers. Thermal paste is the gray compound between your CPU and its heatsink that transfers heat. Over 5–10 years, it can dry out and lose effectiveness. If your CPU temperature has climbed and dust and fans are not the problem, the thermal paste may need replacement. This requires removing the CPU cooler, which is a more involved task — consider asking a technician if you are not comfortable with it.

When to call a professional

If your temperatures are consistently above 90°C after you have cleaned dust from your heatsinks and fans, or if your computer shuts down due to overheating, take it to a repair shop. A technician can check whether your cooler is mounted correctly, replace thermal paste, or replace a failed fan. Do not ignore sustained high temperatures — they shorten your hardware's lifespan and can cause data loss if your computer crashes.

If you are not comfortable opening your computer case, a technician can clean it for you. The cost is usually modest (often $30–$75 for cleaning and inspection), and it can add years to your computer's life.

Frequently Asked Questions

Is 80°C too hot for a CPU?

It depends on your processor and what you are doing. Under heavy load, 80°C is normal for most modern CPUs. At idle or during light use, 80°C is too hot and suggests a cooling problem. Check your fan speed and look for dust. If your CPU is at 80°C while browsing the web, something is wrong.

Can I check my temperature without downloading anything?

Yes, through your BIOS. Restart your computer and press Delete or F2 during startup (your screen will show which key). Navigate to the Hardware Monitor or System Information section. Your CPU temperature appears there. This method does not show GPU temperature and requires a restart each time, so it is less convenient than using software.

Why is my GPU hotter than my CPU?

Graphics cards are designed to run hot and have less sophisticated cooling than CPUs. A GPU at 85°C while gaming is normal. GPUs also have smaller heatsinks relative to their power output, so they naturally run warmer. If your GPU is above 90°C, check that your case has good airflow and that dust is not blocking the card's fans.

Do I need to monitor my temperature all the time?

No. Check your temperature once a month or if your computer feels unusually hot or loud. If temperatures are normal, you do not need to run monitoring software constantly. If you notice a sudden spike or your computer shuts down from overheating, then run a monitoring tool to diagnose the problem.

What is the difference between CPU and GPU temperature?

Your CPU (processor) handles general computing tasks and typically runs cooler. Your GPU (graphics card) handles graphics and gaming and runs hotter by design. Both temperatures matter — a hot CPU suggests a cooling problem, while a hot GPU under gaming load is normal. Monitor both if you have a dedicated graphics card.