Why does my laptop not turn off when the CPU overheats?
Why does my laptop not turn off when the CPU overheats?
I own a Dell Latitude E5570 Laptop equipped with an I7-6820HQ processor, 16GB of RAM, an NVMe drive, and an AMD Radeon R7 M370 (2GB) GPU. It operates on Windows 10. I acquired it second-hand last year and cleaned it completely inside and out after bringing it home. The device is used rarely; when it is in use, it's mainly for writing documents, basic web browsing, and occasionally watching YouTube clips. For tasks demanding more power, I rely on a desktop computer.
Whenever I use the laptop, I notice its bottom becomes uncomfortably hot, the side vents expel intense heat, and even the keyboard and wrist-rest feel warm. I've used many laptops before and haven't seen any of them become this hot externally.
I installed a tool named HWInfo to monitor internal temperatures. It shows CPU temperatures ranging from 110 to 125°F when the machine is idle (with only 1-3% CPU usage). To test performance under load, I opened Firefox, played a 4K, 30fps YouTube video, and observed 45-50% CPU utilization. Under these loads, HWInfo indicates CPU temps fluctuating between 175 and 190°F. Switching to a 4K, 60fps video caused temperatures to rise to around 208°F. At that point, the readings turned red, so I closed the browser. Temperatures then dropped back to 130-145°F, and utilization also decreased.
I found out the system was relying on the built-in graphics processor and neglecting the Radeon R7. I disabled the onboard graphics in the device manager. The system started using the Radeon R7, but this didn't alter the internal or external temperatures.
In the UEFI (or BIOS) I turned off an option labeled "Intel SpeedStep," but it also didn't make a difference.
I'm considering removing the CPU heatsink, thoroughly inspecting everything, cleaning as much as possible, applying fresh thermal paste, and reinstalling it properly. But before I proceed, I need to understand...
1. Why didn’t my computer shut down when the CPU temperatures reached 208°F? I’ve experienced overheating before and the machine would shut down or reboot when too hot. Is this a malfunction on my laptop? And if so, how can I fix it?
2. Why is there such significant external heat even though the CPU temperatures are normal? This seems unusual. What’s happening?
3. What is the typical temperature range for my CPU? Google suggests anything above about 190°F is too high. HWInfo appears to allow up to around 200°F. What’s the safe limit? And what should my readings look like at, say, 50% or 75% utilization?
The system records CPU temperatures ranging from 110 to 125°F during idle periods with 1-3% CPU usage. If this wasn't intentional, readings are 37.8°C and 51.6°C, which is acceptable. To evaluate performance under stress, I launched Firefox, played a 4K video at 30fps, which caused CPU usage to rise to 45-50%. Under these loads, HWInfo shows temperatures between 175 and 190°F. Switching to a 4K video at 60fps increased CPU load to around 75% and pushed temperatures up to 208°F.
https://www.dell.com/support/manual...36...d3c4579ba2&lang=en-us
Running 4K on a laptop that originally outputs 1080p is considered an impractical test for this device.
208°F equals 98.3°C
https://www.intel.com/content/www/u...r-...tions.html
Below 100°C as noted in TJunction.
If temperature concerns arise, consider using ThrottleStop and reducing CPU vcore, cache, iGPU, then the discrete GPU.
Thank you for your reply. Your response clarifies the situation well. The laptop didn't shut down due to hitting the upper temperature limit, but it did approach it closely while CPU usage was only at 75%. This suggests the CPU might be overheating more than expected. What are your thoughts?
What's surprising is that the CPU is loaded at 75% while only watching youtube. But it's an old CPU with only 4 cores so it might not take very much to load it. And laptop thermals are also not always great. With this CPU I assume it's an old computer. You could try to open it and blow out the dust from the fans, heatsinks and vents. If there is some piled dirt or dust inside that prevents the heat to get out, the CPU and the latop itself will get hot.
As mentioned before, everything looks very clean both inside and outside. I think there might be some dust or debris trapped under the heatsink. I haven't removed it yet and I'm unsure about the available space beneath it. Concerning the temperature, I'm a bit puzzled... Are you suggesting that a CPU temperature of 98.3°C isn't unusual if it's operating at 75% utilization?
It relies on various factors:
The room's ambient temperature plays a role. If it were extremely hot, like 104°F (+40°C), the CPU might reach 208°F (+98.3°C) under heavy load. Even at a cooler 71°F (+21°C), the device will still generate heat.
Then think about the laptop's placement. If it rests on a bed and the vents below are blocked, the cooling fans can't circulate air effectively through the heatsink passages.
If the fan bearings are worn or the blades aren't spinning fast enough, the cooling performance will suffer.
The i7-6820HQ model has a standard TDP of 45W. That’s a significant amount of heat to manage in a non-gaming laptop.
Dell might have adjusted the settings so the processor doesn’t draw full power, extending battery life. For instance, you wouldn’t hold a 40W light bulb for long when it’s on.
Heatsinks on laptops often balance size and weight. A desktop PC with a strong CPU can accommodate large heatsinks or multiple fans. Laptops meant for portability usually have less optimal cooling.
I’ve tested many desktop CPUs but never a laptop. I’m cautious about potential issues if the manufacturer uses special thermal adhesives instead of regular paste.
Taking off a heatsink can be challenging if it’s glued in place. If it won’t move, avoid forcing it and risk damaging the chip. Watch repair guides for your model before attempting.
If the system stays cool even when the CPU approaches boiling water, the cooling setup is within its designed limits. I’d skip reapplying the CPU unless you notice frequent crashes under stress and accept that a 45W processor can get warm occasionally.
The room is about 72 degrees and the laptop is sitting on a small table next to my desk, so no problems there. Even when I tried using it in bed, I ended up getting a little "lap desk" to set it on. However, there's a large vent on the bottom of the laptop and I do question whether the the almost non-existent feet are holding the computer up high enough to allow for adequate airflow down there. I hoped I was being paranoid on this point and that Dell wouldn't design something so poorly, but maybe they did.
Sure, but I would certainly classify both of those scenarios as "unusual." That is, the processor is getting hotter than it should, the computer isn't functioning as intended.
For the record, though... there's only one fan in there and, considering the impressive force with which it expels hot air through the side vent, I'd be surprised to learn that it's not functioning at 100%. Still, it's worth checking just to be sure.
I would be low-grade appalled to learn that Dell designed this machine to work this way, but it's certainly a possibility I've considered. We'll see how it turns out. And anytime I'm shopping for laptops in the future, I'm going to check the TDP rating for the processor. I appreciate you mentioning this.
I didn't even know that was a thing. Thank you very much for the heads up. I will definitely be on the lookout.
Most definitely. I do that even if I'm just replacing a hard drive or installing some RAM.
If the machine is going to get this warm all the time, I'm going to sell it for parts and get something else. I think I'm willing to chance the re-pasting, but we'll see what the process looks like in the repair videos first.
Thank you for all your help.
You should keep in mind that processors with numerous cores and fast speeds tend to produce more heat. Previous generation CPUs usually emit more warmth than newer ones when measured per core or per GHz, since their transistors are physically larger. Therefore, a 4-core CPU operating at 2000MHz tends to become hotter than a modern 4-core CPU running at the same frequency. Smaller transistors in newer models reduce heat production, but adding more cores increases overall warmth.
Your i7-6820HQ (released October 27, 2015) has an Intel rating of 45W.
https://www.cpu-world.com/CPUs/Core_i7/Intel-Core i7-6820HQ Mobile processor.html
For comparison, my previous HP laptop features an i5-7200U (released August 30, 2016) with a power consumption of just 15W.
https://www.cpu-world.com/CPUs/Core_i5/Intel-Core i5 i5-7200U.html
My i5-7200U represents a generation ahead of your i7-6820HQ, yet it only offers 4 cores and 4 threads with a peak turbo speed of 3100MHz.
In contrast, your i7 model provides 4 cores with 8 threads and a maximum turbo of 3600MHz. This configuration is considered superior in performance.
Given the increased number of threads, higher clock speeds, and its older generation status, Intel chose a 45W power rating for this CPU—classified as a "performance" model.
If we both used Handbrake on our older machines and processed identical videos, your laptop would complete the task more efficiently but would generate up to three times more heat (just a general note). Handbrake places significant stress on CPUs.
My latest laptop bought in December 2023 is equipped with an i7-13700H from the 13th generation. This represents outdated technology, now surpassed by newer releases.
https://www.cpu-world.com/CPUs/Core_i7/Intel-Core i7 i7-13700H.html
The 17-13700HX variant, with 16 cores and 24 threads, is rated at 55W. The additional threads consume more power.
https://www.cpu-world.com/CPUs/Core_i7/Intel-Core i7 i7-13700HX.html
Please note that maintaining a cooler system often means opting for less powerful processors like i5 or i3, which offer better thermal management and potentially longer battery life. If your system operates smoothly without issues, avoid reworking the CPU unless necessary. Just inspect for signs of degraded thermal paste or loose components, but if the CPU is securely installed, consider adjusting power settings or using throttling tools.
A laptop cpu tends to slow down if it overheats.
It may operate at a reduced clock speed, making high CPU usage appear fake.
Running games while connected usually triggers these issues.
Try this test:
Adjust Windows power settings to balanced mode instead of high performance.
Lower the maximum CPU percentage from the default 100% to 99%.
Observe the results.