Macbook pro heating up

Scorcher

macrumors member
Original poster
Feb 26, 2017
53
35
Recently i noticed that my Macbook pro is getting really hot. I have a 15 inch 2016 Macbook pro, and usually it's fine. I use it for streaming videos, light work and some gaming. When the laptop is in laptop mode (not connected to any peripherals) it heat level's are ok. but when I connect it to an external display it start's to really heat up. so hot that it heart to touch it.
I use the official apple usb c digital multiport adapter (that has usbc c, usb a and hdmi) and an hdmi cable connected to a 27 inch monitor.
Is this normal? did anybody experience something like this?
I'm a little worried that the heat will damage my Macbook
 

keysofanxiety

macrumors G3
Nov 23, 2011
9,534
25,261
It's fine. Plugging into an external monitor immediately activates the dGPU which will run pretty toasty.

It's worth bearing in mind that although the system may feel hot to the touch, that's because the aluminium casing is partly used to displace heat, so the internal components are actually running cooler than they otherwise would be in a plastic enclosure which feels cooler to the touch.

TL;DR: don't worry at all, it's perfectly normal. :)
 

Scorcher

macrumors member
Original poster
Feb 26, 2017
53
35
It's fine. Plugging into an external monitor immediately activates the dGPU which will run pretty toasty.

It's worth bearing in mind that although the system may feel hot to the touch, that's because the aluminium casing is partly used to displace heat, so the internal components are actually running cooler than they otherwise would be in a plastic enclosure which feels cooler to the touch.

TL;DR: don't worry at all, it's perfectly normal. :)
OK. Can you tell me what's a normal temperature for the Macbook? like what is too high?
 

keysofanxiety

macrumors G3
Nov 23, 2011
9,534
25,261
OK. Can you tell me what's a normal temperature for the Macbook? like what is too high?
Err, probably around 85C for the GPU, 95C for the CPU. But if either of them approach the thermal limit, they'll throttle to cool down. Worst case scenario it'll shut off to prevent damage.
 

leman

macrumors G4
Oct 14, 2008
11,026
5,519
OK. Can you tell me what's a normal temperature for the Macbook? like what is too high?
The CPU is designed to run at temps up to 100C, the GPU at temps at around 80C (or a bit higher). Now, if you constantly observe these temps even with light workloads, then something is probably wrong with the cooling system.
 
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