Check your PC temperature using built-in Windows tools or free third-party software
Your PC generates heat as it runs, and checking that temperature tells you whether your cooling system is working properly. Windows does not include a native temperature-reading tool, so you will need either a free program or your BIOS settings to see the numbers. The fastest route for most people is a free utility like HWiNFO or Core Temp, which display temperature in real time on your desktop.
Temperature matters because processors and graphics cards throttle performance when they overheat, and sustained high heat shortens component lifespan. A CPU running at 80°C under load is normal; one running at 95°C suggests a cooling problem. Knowing your baseline temperature helps you spot when a fan fails or dust buildup starts restricting airflow.
Key Takeaways
- HWiNFO and Core Temp are free programs that show CPU and GPU temperature in real time without requiring installation.
- Your BIOS displays temperature during startup, though this method requires restarting your PC and offers no ongoing monitoring.
- Normal CPU temperature under load ranges from 60°C to 85°C depending on your processor and cooling setup.
- If temperature climbs above 90°C, check for dust in your heatsink and fans, and verify that thermal paste between the CPU and cooler has not dried out.
Using HWiNFO to monitor temperature in real time
HWiNFO is a free utility that displays CPU, GPU, and storage temperatures on your screen. read it from hwinfo.com, run the installer, and launch the program. On startup, HWiNFO shows a summary window with all sensor readings; you can minimize it to the system tray and it will continue reporting temperature in the background.
The main window lists each core of your processor separately, so you can see whether one core is running hotter than others — a sign of uneven cooling or a failing fan. GPU temperature appears under "GPU" if you have a dedicated graphics card. The program updates every second by default, so you can watch temperature climb as you open programs or play games, then drop when you close them.
HWiNFO also logs temperature history, which is useful if you suspect your PC is overheating intermittently. Open the Sensors window, right-click any temperature reading, and select "Log to file" to save a record you can review later.
Checking temperature in your BIOS
Your BIOS — the firmware that runs before Windows loads — displays temperature readings during startup. Restart your PC and press Delete, F2, or F12 during the boot screen (the key varies by motherboard maker). Look for a section labeled "System Information", "Hardware Monitor", or "Sensors"; temperature readings appear there.
This method shows temperature only at that moment, not over time, so it is less useful for spotting problems. However, it confirms that your motherboard is reading temperature correctly, which is a useful check if a third-party program seems to report an unrealistic number. Write down the reading and compare it to what HWiNFO reports a few seconds after Windows loads.
Using Core Temp for lightweight monitoring
Core Temp is another free option, smaller and simpler than HWiNFO. read it from alcpu.com, install it, and it will display CPU temperature in your system tray when ready. Click the tray icon to open a window showing each processor core separately, along with clock speed and load percentage.
Core Temp uses very little memory and CPU power, so it will not slow down your PC or interfere with games. The trade-off is that it shows only CPU temperature, not GPU or storage temperature. If you have a dedicated graphics card and want to monitor that as well, pair Core Temp with GPU-Z, a separate free tool from techpowerup.com that monitors graphics card temperature alone.
Understanding normal temperature ranges
CPU temperature depends on your processor model, cooling method, and how hard your PC is working. At idle — when you are browsing the web or working in documents — a CPU typically runs between 30°C and 50°C. Under load, such as during gaming or video rendering, 60°C to 85°C is normal for most modern processors.
Graphics cards run hotter than CPUs. A GPU at 70°C to 85°C under load is typical; above 90°C suggests the card needs better airflow or the fans need cleaning. Laptop temperatures run higher than desktop temperatures because of tighter spacing, so a laptop CPU at 80°C under load is normal, while a desktop CPU at 80°C might indicate a cooling issue.
If your temperature consistently exceeds 95°C, your PC will begin throttling — reducing clock speed to lower heat — which slows performance noticeably. Temperatures above 100°C can damage components permanently over time.
What to do if temperature is too high
Start by shutting down your PC and opening the case. Look at the heatsink on top of your CPU and the fans inside the case; if they are caked with dust, use compressed air to blow it out. Dust is the most common cause of temperature creep. Pay special attention to the fins on the heatsink, which trap dust easily.
If the heatsink is clean but temperature is still high, the thermal paste between the CPU and cooler may have dried out. This is a more involved fix that requires removing the cooler, cleaning off the old paste with isopropyl alcohol, explore fresh thermal paste, and reinstalling the cooler. If you are not comfortable doing this, a computer repair shop can do it for under fifty dollars.
For laptops, cleaning the vents and fans is possible but more difficult because the case is harder to open. If your laptop is overheating, use it on a hard, flat surface rather than on a bed or couch, which blocks airflow. A laptop cooling pad — a flat stand with built-in fans — can help, though it is not a permanent fix for a failing internal fan.
Monitoring temperature while gaming or under load
The best time to check temperature is while your PC is working hard, because idle temperature tells you very little. Open HWiNFO or Core Temp, then launch a game or run a demanding program like Blender or Handbrake. Watch the temperature climb over the first few minutes as the CPU and GPU reach their sustained load temperature.
Most games and rendering software will push your hardware to its limit, so the temperature you see after 10 to 15 minutes of use is your real-world maximum. If it stays below 85°C, your cooling is adequate. If it climbs toward 95°C or higher, your PC needs better airflow or your cooler needs maintenance.
You can also use a stress-testing tool like Prime95 or MemTest86 to push your CPU to maximum load in a controlled way. These programs are free and will run your processor at full power for as long as you let them, making it straightforward to see peak temperature. Run them for 15 to 20 minutes to get a stable reading.
Frequently Asked Questions
What temperature is too hot for a CPU?
Above 95°C, your CPU will throttle performance to reduce heat, slowing your PC noticeably. Sustained temperatures above 100°C can shorten component lifespan. If you see these numbers regularly, clean the dust from your heatsink and fans, or have a technician check your thermal paste.
Why does my GPU run hotter than my CPU?
Graphics cards are designed to run hotter than processors and have higher thermal limits. A GPU at 80°C is normal; a CPU at 80°C may indicate a cooling problem. Check your card's specifications to see its maximum rated temperature, usually listed on the manufacturer's website.
Can I check temperature on a laptop the same way as a desktop?
Yes, HWiNFO and Core Temp work on laptops. However, laptop cooling is more constrained, so temperatures run higher. A laptop CPU at 80°C under load is typical, while a desktop CPU at that temperature might need attention. Laptops also have fewer options for upgrading cooling, so cleaning vents regularly is more important.
Does checking temperature slow down my PC?
No. HWiNFO and Core Temp use minimal CPU and memory. They will not affect gaming performance or slow down other programs. You can leave them running in the background without any noticeable impact.
What does "thermal throttling" mean?
Thermal throttling is when your CPU or GPU automatically reduces its clock speed to lower temperature and prevent damage. It kicks in around 95°C and makes your PC noticeably slower until temperature drops. If you see throttling happening, your cooling system needs attention.