Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

Mattie12345

macrumors member
Original poster
May 5, 2020
65
10
Last edited:
  • Sad
Reactions: Brian Clifford

IngerMan

macrumors 68020
Feb 21, 2011
2,012
903
Michigan
I copied the article and can be viewed here. It would be nice if someone could test this.



A new piece of research claims that plugging in a MacBook Pro charger on the left-hand side of the device can cause the laptop to run hot, potentially affecting its performance.

Modern MacBook Pro laptops have only USB-C ports on either side of the laptop, with users able to plug the charger in on either side of the device.

However, research published on StackExchange claims that putting the charger in on the left-hand side alongside other peripherals causes spikes in the laptop’s temperature.

The research shows that within four minutes of the laptop being charged from the left-hand ports, alongside a USB-C-to-HDMI adapter, the temperature sensor on the left-hand side of the laptop detects a heat spike. This seemingly causes a process called kernal_task to kick in, triggering high CPU usage and fans to start whirring.

However, when the charger is moved from the left-hand ports to those on the right, the temperature drops and kernel_task stops running within as little as 15 seconds.
 
  • Like
Reactions: Brian Clifford

Brian Clifford

macrumors regular
Oct 23, 2016
127
78
Has anyone noticed or tested to see if or not the bottom of the new MacBook Pro 2020 runs hot without going into turbo range ?

Also what is this about charging the laptop on the right hand side as charging on the left hand side with peripherals causes spikes in the laptop temperature ?

heres’s a link to that article https://www.google.com/amp/s/www.fo...your-macbook-pro-from-the-left-hand-side/amp/

Delighted Mattie12345 raised this question. I came across a second instance of this particular issue being raised by a lesser known Youtuber only this morning.

For those more familiar with these matters, what sort of issue is this? Is it software (macOS?) or hardware (TB ports?), and is it an issue apple are likely to resolve?
 

triangletechie

macrumors 65816
Apr 21, 2017
1,016
1,746
NC
anyone having heat issues with their 2020 MBP (10th gen processor)? I only had a couple of Safari tabs open earlier and the top and bottom got very warm. I shut it down and have a couple of tabs open again and it's cool to the touch. I'm not sure what is acceptable heat for this machine.
 

jerryk

macrumors 604
Nov 3, 2011
7,418
4,207
SF Bay Area
anyone having heat issues with their 2020 MBP (10th gen processor)? I only had a couple of Safari tabs open earlier and the top and bottom got very warm. I shut it down and have a couple of tabs open again and it's cool to the touch. I'm not sure what is acceptable heat for this machine.

Mine is cool to the touch. But I never put a notebook on my lap. Always on a desk or stand of some sort.

Also, I almost plug it into a left ports since that is closest to the power outlet.
 

triangletechie

macrumors 65816
Apr 21, 2017
1,016
1,746
NC
Mine isn’t on my lap. It’s on a table. When the heat cranked up I could feel it through the keyboard.
 

jerryk

macrumors 604
Nov 3, 2011
7,418
4,207
SF Bay Area
Mine isn’t on my lap. It’s on a table. When the heat cranked up I could feel it through the keyboard.
What does Activity Monitor show is using the processor? It is pretty easy for a webpage with some tight compute/communication loops or fast graphics to use a lot of CPU/GPU cycles and generate a lot of heat.
 
Last edited:

polee

macrumors 6502a
Jul 22, 2008
689
458
My 8th Gen CPU macbook pro 2020 with 2 USB C ports gets warm to the touch too. I am not sure why but it could be some app conflicts. Sometimes it gets warm then it cools down.
 

triangletechie

macrumors 65816
Apr 21, 2017
1,016
1,746
NC
What does Activity Monitor show is using the processor? It is pretty easy for a webpage with some tight compute/communication loops or fast graphics to use a lot of CPU/GPU cycles and generate a lot of heat.
I think one was accountsd.
 

jerryk

macrumors 604
Nov 3, 2011
7,418
4,207
SF Bay Area
Be sure you sort the display by % CPU. And if accountsd is using a higher percentage of the CPU, this has been reported here and other places.

Notice one the reason for accountd's high CPU usage is index sorting. This occurs for a number of hours on new machines or major installs. So make sure you let the system run (not sleeping) for a while (maybe overnight) after these activities. This a common cause for complaints of high CPU usage on new machines.
 
Last edited:
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.