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rMBP 15" Temp at 98 Celsius When Converting videos

J

jkundi

macrumors regular
Original poster
Mar 31, 2014
138
6
Hey guys, I'm just a little concerned about my rMBP which I've owned for 2 months. I use it for web and video production most of the time and for the last three days I have been converting video formats which makes the temperarure hit 98 Celsius for a straight 12 hours of use per day. I have my fans at full speed and sitting in a cool room. I'm just worried I may kill my rMBP 2.3GHz i7, will it survive the ordeal. Anything I should be concerned about?

Thanks.
 
Its expected when doing something as CPU intensive that the temps will increase. What's the normal temperatures that you see when not pushing it so hard?
 
Processor wise 98C is the average peak temp MBP/Mac minis will hit under full load for that level of sustained task. Average idle-mid CPU load temps to expect for an air conditioned room should be between 60-70C in the summer.

Use a notebook cooling pad to reduce the load on the internal fans sometimes it'll help drop the temp by 5-8C, if you're doing that for 12 hours it'll slowly put a dent into the battery and lithium batteries are prone to having a shortened life under sustained heat. My old 2010 MBP had a shortened life as DC/NYC temps were much higher than New England so battery capacity rapidly half-ed by the 3rd year :eek:
 
Normal temperature when surfing the web and not doing much is around 50-55C. I bought a Belkin cooling stand early on today and it's not helped at all. Perhaps Belkin are not good. Any recommendations?
 
jkundi said:
Normal temperature when surfing the web and not doing much is around 50-55C. I bought a Belkin cooling stand early on today and it's not helped at all. Perhaps Belkin are not good. Any recommendations?
Click to expand...

Is it an active cooling (integrated fan/cooling base) or passive (just allows more air) ?
 
It's this one http://www.amazon.co.uk/gp/aw/d/B001HNOLBI/ref=pd_aw_sbs_1/280-5477772-0983732?pi=SS115

I don't think it's helped at all.
 
jkundi said:
It's this one http://www.amazon.co.uk/gp/aw/d/B001HNOLBI/ref=pd_aw_sbs_1/280-5477772-0983732?pi=SS115

I don't think it's helped at all.
Click to expand...

It is a passive one and since it is made of plastic, it does not conduct heat as good as something made from metal, like a MacBook Pro with Retina Display for example.

Also read the link I posted, it will show you, that the CPU can withstand such temperatures and will not shorten its life, but then again, those aftermarket laptop coolers need their money.
 
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Thanks. Yeah I will return it as it's not made a difference. So technically speaking I can continue converting my files and not damage my rMBP hopefully won't be more than a day or two not including overnight when it is turned off.
 
jkundi said:
Thanks. Yeah I will return it as it's not made a difference. So technically speaking I can continue converting my files and not damage my rMBP hopefully won't be more than a day or two not including overnight when it is turned off.
Click to expand...

Yes, I have run my slow 2009 MBP at maximum load for several weeks to transcode something or capture something and it still works.
 
Disabling TurboBoost will cut CPU temps by as much as 20*C but obviously you will pay back with longer encode times.
 
priitv8 said:
Disabling TurboBoost will cut CPU temps by as much as 20*C but obviously you will pay back with longer encode times.
Click to expand...

Im 95% sure you cannot disable it but generally speaking, encoding uses all of the cores. Turbo boost really only activates when not all of the cores are in use.
So even if you could disable it, it wouldn't make a difference.

Isaac
 
jkundi said:
I thought that was something you can not disable? :confused:
Click to expand...
Yes you can. You need the KEXT for that.
isaacallen said:
So even if you could disable it, it wouldn't make a difference.
Click to expand...
It will. About 20*C as I said. Because the net effect (on my 2.7GHz i7 CPU) is, that no core will ever be boosted beyond 2.7GHz. Check the attached pic of starting a HandBrake conversion with TB enabled and then disabling it.
I have it disabled on my machine, most of the time. It caps also the power consumption of CPU to around 1/2 of it's design maximum : 45W.
https://forums.macrumors.com/threads/1387883/
You will also find a link to Turbo Boost Switcher for OS X in that thread.
 

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