How to Check CPU Temperature on Windows 11

Download HWiNFO — free, pick “Sensors-only” when it launches. Scroll down to the CPU section, find “CPU Package” temperature. That’s the one that matters. Ignore the per-core readings for now, they bounce around too fast to be useful for a quick check. CPU Package is the aggregate — what the chip as a whole is doing.

Under 50°C sitting on the desktop with Chrome and Spotify open is normal. Under 80°C while gaming or editing video is fine. 80-90°C under heavy load is getting warm but most modern chips are rated for it — Intel’s max junction temp is 100°C on 12th-14th gen, AMD’s is 95°C on Ryzen 7000. Above 90°C consistently at idle or during light use means something has failed in your cooling system. Above 95°C and the CPU is throttling itself — running at maybe half speed to keep from cooking. Task Manager won’t tell you this is happening, the CPU just silently slows down and everything feels sluggish.

Don’t use Core Temp on AMD Ryzen — older versions read Tctl instead of Tdie and add a 20°C offset that doesn’t exist on newer chips. You’ll think your CPU is at 85°C when it’s actually at 65°C. HWiNFO handles this correctly and labels both values.

There’s also BIOS but I never recommend checking temperature there for one reason nobody talks about: when you’re in BIOS, the CPU has no workload and no power management, so it sits at a higher idle than in Windows. People check BIOS, see 55°C, panic because “that’s hot for idle” — no, BIOS idle is always 5-15°C warmer than Windows idle because Windows aggressively downclocks the CPU when nothing is running and BIOS doesn’t.

What the Numbers Mean

A customer called about his desktop running slow. Task Manager looked fine — CPU at 12%, RAM fine, disk fine. I had him install HWiNFO. CPU Package at idle: 94°C. On the desktop. Doing nothing. His cooler fan had died, the heatsink was still attached but just a passive block of aluminum conducting heat away from the die at a rate of basically nothing. He’d been running like this for weeks, the CPU throttled down to 800MHz to survive. Replaced a $25 fan and he was back to full speed.

The temperature you should worry about depends entirely on your cooling. A 65-watt desktop chip on a tower cooler should idle at 30-40°C and max out at 65-75°C under full load. The same 65-watt chip on the stock Intel cooler — that sad little aluminum thing with the copper slug in the center — runs 45-55°C idle and hits 90°C under Cinebench. Both are technically “working” but one has 25°C of thermal headroom and the other has none.

Laptops run hotter than desktops. Always. A 45-watt mobile chip cooled by a single fan the size of a cookie in a 20mm-thick chassis will hit 85°C under load and that’s completely normal for the form factor. Comparing your laptop temps to what desktop users post online is pointless — different physics.

If your temperatures look suspiciously low — like 25°C under load — the sensor is probably wrong. I’ve seen this twice on Gigabyte boards where a BIOS update broke the thermal sensor reporting and HWiNFO showed 28°C while the heatsink was hot enough to burn my finger. Updated the BIOS and the real temperature appeared: 78°C.

Stress Testing

Knowing your idle temp is half the picture. You need to see what happens under full load for at least ten minutes. Cinebench R23 is the easiest — free download, run the multi-core test, takes about ten minutes. Watch HWiNFO’s CPU Package temp the whole time. On a properly cooled desktop it should plateau at 70-80°C and stay there. On a laptop it’ll climb to 85-95°C and the clock speed will start stepping down — watch the “Core Clocks” section in HWiNFO, if they drop from 4.5GHz to 3.2GHz mid-test, the CPU is thermal throttling and you have a cooling problem.

Prime95 Small FFTs is the nuclear option — generates more heat than any real workload ever will. I use it when I want to know the absolute worst case. If your system survives 30 minutes of Small FFTs without hitting 100°C, real-world workloads will never be a thermal problem.

If temps are too high, the fix depends on what you have. Desktops: clean the dust out of the heatsink, check that the fans are spinning, consider replacing thermal paste if the system is 3+ years old. Laptops: our overheating guide covers cleaning, repasting, and the 99% processor state trick that drops temps 15-20°C. If the fan is running loud at all times, that’s usually dust. If the laptop is freezing during heavy use, thermal throttling is the likely cause. Our speed optimization includes a thermal analysis if you want someone to read your HWiNFO logs and tell you exactly what’s wrong.