CPU overheating

My_King

My_King

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Anyone got some advise on below?

I have a Dell Latitude 7450 in front of me and the system keeps shutting down due to excessive heat from the CPU.

Left it over night off and when I got in this morning I replaced the thermal paste and placed everything back in place.
Same issue.

The heat sink is doing its job and heat is getting all the way to the CPU fan. CPU fan is doing its job and spins from 3500 RPM to 5500RPM. All this while being in diagnostic mode. So no OS and weird software running to cause this.

I guess what I am asking, Is the CPU screwed?

*Dell says no parts, they can't assist.
 
Sjoe... a cpu with no fan directly on it...

What happens if you switch it on while holding the laptop a few centimetres from a surface?
 
Install throttlestop.

www.techpowerup.com

ThrottleStop 9.7.3 Download

ThrottleStop is a small application designed to monitor for and correct the three main types of CPU throttling that are being used on many lapto
www.techpowerup.com

Play around a bit lower the clocks until it is stable.
 
CamiKaze said:
Sjoe... a cpu with no fan directly on it...

What happens if you switch it on while holding the laptop a few centimetres from a surface?
Click to expand...

On the pic to the left that black metal you see is the heatsink. Then the heatsink folows a half circle where the fan blows it cool. (If I understand your comment)

I get your second statement. The problem still occurs as the laptop is standing on its screen with motherboard in the air. In the diagnostic menu and the CPU is sitting at 60 degrees. starting the diagnostic moves the heat to 80%.
 
Gtx Gaming said:
Install throttlestop.

www.techpowerup.com

ThrottleStop 9.7.3 Download

ThrottleStop is a small application designed to monitor for and correct the three main types of CPU throttling that are being used on many lapto
www.techpowerup.com

Play around a bit lower the clocks until it is stable.
Click to expand...

Thanks for the reply. Thinking I have to under clock it so the user can work at least
 
You can underclock it, but that doesn't change the fact there's something wrong. Double check the screws on the heatsink, may not be making proper contact with the CPU. Also check the Heatsink isn't bent - they're easy to bend, could be a bent pipe affecting the angle and thus reducing contact between the CPU and heatsink.

Did you also dust the fan and exhaust port?
 
UrBaN963 said:
You can underclock it, but that doesn't change the fact there's something wrong. Double check you screws on the heatsink, may not be making proper contact with the CPU. Also check the Heatsink isn't bent - they're easy to bend, could be a bent pipe affecting the angle and thus reducing contact between the CPU and heatsink.

Did you also dust the fan and exhaust port?
Click to expand...

Jip all of that is done. Heatsink at the exhaust port burns your fingers when touched.
Conducting heat like a mofo :)
 
Sounds to me like something wrong with a BIOS setting then. Like it's overvolting.

Check the BIOS version, an update may help. Specifically:


Dell Latitude E7450 System BIOS
RESTART REQUIRED
This package provides the Dell System BIOS update and is supported on Dell Latitude E7450 for Windows and DOS Operating Systems.
Fixes & Enhancements
Fixes
- None

Enhancements
- Updated Dell ePSA ROM to improve CPU thermal management.
- Updated Intel Management Engine Firmware.
- Update SMM runtime support.
- Updated docking behavior when LID is closed.
- Improved Windows 10 Enterprise Edition support.
Version
Version A15, A15
Category
BIOS
Release date
06 Jan 2017
Last Updated
24 Feb 2017
 
UrBaN963 said:
Sounds to me like something wrong with a BIOS setting then. Like it's overvolting.

Check the BIOS version, an update may help. Specifically:


Dell Latitude E7450 System BIOS
RESTART REQUIRED
This package provides the Dell System BIOS update and is supported on Dell Latitude E7450 for Windows and DOS Operating Systems.
Fixes & Enhancements
Fixes
- None

Enhancements
- Updated Dell ePSA ROM to improve CPU thermal management.
- Updated Intel Management Engine Firmware.
- Update SMM runtime support.
- Updated docking behavior when LID is closed.
- Improved Windows 10 Enterprise Edition support.
Version
Version A15, A15
Category
BIOS
Release date
06 Jan 2017
Last Updated
24 Feb 2017
Click to expand...

Last update done 6 months ago. Giving this a try. Thank you
 
UrBaN963 said:
Sounds to me like something wrong with a BIOS setting then. Like it's overvolting.

Check the BIOS version, an update may help. Specifically:


Dell Latitude E7450 System BIOS
RESTART REQUIRED
This package provides the Dell System BIOS update and is supported on Dell Latitude E7450 for Windows and DOS Operating Systems.
Fixes & Enhancements
Fixes
- None

Enhancements
- Updated Dell ePSA ROM to improve CPU thermal management.
- Updated Intel Management Engine Firmware.
- Update SMM runtime support.
- Updated docking behavior when LID is closed.
- Improved Windows 10 Enterprise Edition support.
Version
Version A15, A15
Category
BIOS
Release date
06 Jan 2017
Last Updated
24 Feb 2017
Click to expand...

No luck. Running the updated version already
 
Hellhound105 said:
Left it over night off and when I got in this morning I replaced the thermal paste and placed everything back in place.
Same issue.
Click to expand...

There are 2 versions of coolers for that model of laptop. Earlier versions had a heatsink that was smaller and did not cover the 'Northbridge' area.

Did you need to apply thermal paste to just one area, or two?
 
oldhat said:
There are 2 versions of coolers for that model of laptop. Earlier versions had a heatsink that was smaller and did not cover the 'Northbridge' area.

Did you need to apply thermal paste to just one area, or two?
Click to expand...

1 chip with 2 diodes. Expecting the 2nd diode to be north bridge/GPU.
 
Perhaps the copper pipe has a crack or puncture in it, thus not cooling well enough.

In windows install a program called Coretemp, it will tell you how hot it is and how far it is from hitting TJ Max. It also shows you the core voltage.
 
A quick google indicates many a 7450 overheating with no real solution.

Only thing I have not seen mentioned here s disabling vpro in bios or using a custom bios & installing a fresh os noot rom dell recovery partition.

New laptop?
 
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