The central processing unit (CPU) and the graphics processing unit (GPU) are the two pieces of hardware that produce the most heat in any computer.
How much heat a CPU (or a GPU) will produce relies on its power draw. A larger power draw generally implies superior performance.
However, if a processor’s temperature goes beyond its maximum limit, it can start throttling and overheating, resulting in a system shutdown.
If you are having issues with a CPU overheating, this is where you will find a solution to those problems.
Let’s fix that CPU!
Table of ContentsShow
Fix 1: Dust Off Cooler
Any CPU from these past ten years or more can’t function without an operational cooler. In other words, you most probably have a cooler on your PC.
Over time, dust will almost always start gathering inside the system. Usually, the dust that accumulates in the computer isn’t a huge issue, but it can become one if left unattended for a long time.
This is especially true if a lot of dust is stuck in the CPU’s fan/cooler.
So, if you have never cleaned your computer from dust before, this might be the reason why your processor is overheating.
Here’s a quick guide to help you with cleaning your PC:
- Bring your PC outside (there is going to be a lot of dust).
- Take the side-panel screws off your computer (a screwdriver may not be needed if there are thumbscrews).
- You can use an anti-static microfiber cloth, a compressed air can, or an electric blower to get rid of the dust.
- Your main focus should be the CPU coolers, its fans, and the case fans. If needed, remove the fan from the cooler for some in-depth cleaning.
Once you think the PC is clean enough, close it up, plug it in and test it out. Make sure to use the right monitoring software for accurate temperature readings.
Fix 2: Troubleshoot Your Air Cooler
If dusting the entire PC didn’t improve thermal performance, the problem might be with the cooler itself.
But, wait. That does not mean you should immediately get out and buy yourself a new cooler. First, let’s try to do some troubleshooting.
Fix 2.1: Check If The Fan Is Working
First things first, you’ll have to check whether the fan is actually working. You’ll need to open it up if you don’t have a PC case with a window/glass panel.
So, leave your computer running, open the side panel and look inside to ensure that the fan on the CPU cooler is spinning. If it isn’t, maybe try running a game to ensure that the CPU hits that temperature threshold to start the fans spinning.
After all this testing, the fan doesn’t spin; you will need to replace it.
Fortunately, most CPU coolers have substitutable fans, so you can replace them with any other fan you can find. Just make sure it is the correct size.
Fix 2.2: Make Sure CPU Fan Is Plugged In
The fan might not be spinning because it simply isn’t plugged in.
This could happen when a computer gets moved, or maybe it wasn’t linked correctly, causing a loss of the right connection.
However, before you start poking around in the PC, make sure it is completely turned off this time. Also, press the switch on the back of the case to shut off power to the PSU. We also recommend pressing the case’s power button multiple times to empty all capacitors of power.
You can now safely reach into the PC and look for the fan cable. Trace it to its end and see if it is plugged anywhere. If it isn’t, look for a quadruplet (sometimes 3-pin) connector with the writing CPU_Fan around it.
Remember, you can also utilize the CPU_OPT and CPU_PUMP connectors.
After you’ve plugged the fan in, leave the case open, boot the PC and see whether it spins up. If it doesn’t, you’ll have to resort to a more expensive solution.
Fix 2.3: Adjust Fan Curve
When the CPU fan spins up as intended, but you’re still having overheating troubles, the fan curve on your PC may be simply not aggressive enough.
You can modify your computer’s fan curve either through your motherboard’s software or BIOS.
Check out AI Suite for ASUS boards, SpeedFan, Easy Tune for Gigabyte, Argus Monitor, NZXT CAM, and others.
If the software does not pick up your fans, it’s best to use your BIOS for fan control. To get to your system’s BIOS, restart the computer and immediately start spamming the F2, Delete, or F10 keys (depending on the motherboard brand).
Once you get into your BIOS, start looking for fan control options and make sure to select the correct fan (CPU).
You can also play around with the case fan curves to push the temperatures even lower. Keep in mind; this will increase system noise.
Fix 3: Troubleshoot Your AIO
Water coolers or AIOs work a bit differently than regular air coolers. They are also more expensive and have more failure points like the pump, tubes, radiator, and fans.
Although today’s AIOs are much safer and are built to last.
However, it is still definitely possible that the AIO is the cause of CPU overheating in your system, so let’s troubleshoot it!
Fix 3.1: Ensure Pump Is Plugged In
The pump is the most important part of every water cooling loop. Its role is to pump the water into the radiator, where it’s cooled and then pulled back into the pump to cool the processor.
If the pump is plugged in the wrong header or isn’t plugged at all, there’s a risk of CPU overheating.
To check that, resort to the same guide we shared above about plugging the CPU fan in. However, this time, instead of looking for the CPU_Fan header, try to find a CPU_PUMP header. This header is optimal for AIO pumps because it cannot be controlled and always runs at 100%.
Not all motherboards have this header, though. Alternatively, you can use CPU_OUT or CPU_FAN headers.
Fix 3.2: Ensure the Pump Is Running At 100%
This stage is extremely important for any system with an AIO. The pump must be operating at utmost capacity to ensure regular circulation of water in the cooling loop. If not, your CPU may become excessively hot.
If your pump is connected to the CPU_PUMPheader, you don’t have to do anything as your pump is already running at 100%.
But, if it isn’t, then you will have to head into your BIOS. So, again, restart your PC and start smashing F2, F10, or Delete.
Once you are in your BIOS, head over to fan control and select the pump, you should have the option to switch between PWM and DC. You can choose just PWM, and the pump will always work at full speed.
Alternatively, you can modify the fan curve to consistently guarantee that the pump continuously operates at maximum speed.
Fix 4: Check And Replace Thermal Paste
Thermal paste is a crucial part of any computer of today. Without it, both GPUs and CPUs can overheat.
The purpose of thermal paste is to eliminate any gaps between a processor’s IHS (integrated heat spreader) and a cooler’s cold plate. By removing the air gaps between these two metal objects, heat can transfer much more efficiently.
Over time, the thermal paste in your computer can dry out. In fact, it is possible that there isn’t any thermal paste applied at all, which can be the cause of overheating.
So, you should inspect the thermal paste, clean it, and substitute it. However, before you open your computer, ensure to purchase good thermal paste first, high-class isopropyl alcohol, and prepare toilet paper.
Again, ensure there’s no electricity to the computer!
To simplify this process a little, here’s a brief guide.
- Boot your computer and run it for a few minutes to warm the CPU up. Don’t skip this step! This step heats up the thermal paste and will be easier to remove from the cooler.
- Remove your PC’s side panel and remove the four screws on every corner of the cooler.
- Start carefully pulling the cooler towards you. Once removed, put away the cooler and leave the CPU in its socket.
- Grab a piece of dry toilet paper, lightly wipe the CPU, soak another piece of toilet paper with the isopropyl alcohol, and lightly rub off the rest of the thermal paste.
- Finally, grab the thermal paste (which usually comes in a syringe) and put a pea-sized dot in the middle of the processor.
- Screw the cooler back in place, plug the fan/pump in and then boot your computer.
With thermal compound reapplied, CPU temperatures should be normalized. If not, there’s something else bottlenecking your PC.
If you’re struggling with thermal paste, this video by Linus Tech Tips could offer assistance.
Fix 5: Stop Your Overclocks
People rarely overclock their CPUs, but if you are one of those who do, it is time to tone it down a little bit.
That extra power going into the processor might be why it is overheating. So, whether you are using overclocking software or overclocking through your BIOS, it’s time to get your CPU back to its stock settings.
The easiest way is to head over to your BIOS and hit reset to defaults. That will reset your CPU and RAM overclock and any other adjustments you have in your BIOS.
If you’re unable to access your BIOS for any reason, there’s another method to reset it. Initially, power off your computer, switch off the PSU power button, and unlatch the side panel.
Here, you should look for the CMOS battery, a circular and silver object like in the image below.
To remove it, press the little metal tab on the side. Leave it out for a couple of minutes, and then put it back in by pressing it into place.
Boot your computer, spam F2, F10, or Delete to get into BIOS, and every setting should be reset to default.
Fix 6: Add More Case Fans
We’ve gone through the solutions that work for most people. But, if your CPU is still overheating, you might have to spend a few dollars for an actual solution.
The cheapest way to resolve all of this is by adding more case fans.
More case fans for intake and exhaust can improve air circulation around your processor, ultimately improving temperatures. Fortunately, you can grab a few fans for cheap if they don’t have any RGB. Unfortunately, RGB fans are usually more expensive.
Keep in mind the fans’ size (120mm is the most common) and whether you have enough space for more fans.
Additionally, you will need to have enough fan headers on your motherboard. Or you could get a splitter or a fan hub.
Finally, air circulation. You can use fans to either bring air inside or push air outside. Our recommendation is to put a few at the front for intake and several at the back (and higher areas) for exhaust.
Here’s an image illustrating which side is intake and which side is exhaust:
Fix 7: Replace Your Cooler
Now, we’re transitioning to pricier solutions, unfortunately, but superior to having your CPU overheat, right?
After trying everything from above, it’s possible that the cooler is dysfunctional or not powerful enough to cool your CPU.
Either way, you need a new one. But, of course, there are plenty of budget options out there that provide enough cooling for any processor.
It’s not a bad idea to go for high-end AIOs or air coolers. For example, Noctua’s air coolers are considered some of the best on the market. NZXT’s AIOs are also a great example.
Fix 8: Replace Your CPU
Finally, we come to the worst possible and most expensive solution. No one wants to come to this, but if buying a new cooler, adding more fans, or replacing the thermal paste didn’t fix your CPU overheating problems, there might be no other option.
It’s possible that the CPU’s heat spreader is warped or that the CPU die itself is dysfunctional. If you’re still under warranty, you can send it back to get a new one.
If not, you will need to spend some cash to get a fresh Ryzen or Intel system running.
