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Overheating with TwelveSouth BookArc?

DaDalle

macrumors member
Original poster
Sep 17, 2011
99
6
Hey there,

I just bough a third monitor and want to use my MacBook in clamshell mode with the BookArc. Most of the time when using an external Monitor my fans will start kicking in after some time and this also happens with the BookArc.

Will my macbook overheat with the BookArc with three external displays and cpu intense work?

Thanks!

Ps. I use a MacBook Air BookArc with my 15" rMBP.
 

soupcan

macrumors 6502a
Nov 21, 2014
725
2,926
Netherlands
It won't overheat, but it will get hot (of course).

Thing is though, if you're doing work with 3 external displays that's CPU intensive why do you do that on a notebook? Get a desktop, an iMac or Mac Pro, or a Windows equivalent.
 
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DaDalle

macrumors member
Original poster
Sep 17, 2011
99
6
Thanks!
The MBP does well enough for my needs and I need to carry around my work most of the time. But you're right powering multiple monitors plus cpu usage isn't optimal for a laptop.
 
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wuush

macrumors member
May 4, 2014
76
9
I have a question regarding the BookArc and i don't think it deserves its own thread.

Do many people use the BookArc? and if you reply please state if you use/used a BookArc.
Isn't the BookArc a total construction failure?
The Macbook has the air intakes on the side and the hot air goes out through the Display Hinge.
Doesn't this stress the Macbook more than normal, because hot air travels up and if you use the BookArc and Macbook in the correct orientation (like in the marketing photos) it works against the thermal design of Apple?
 
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snaky69

macrumors 603
Mar 14, 2008
5,904
484
Hey there,

I just bough a third monitor and want to use my MacBook in clamshell mode with the BookArc. Most of the time when using an external Monitor my fans will start kicking in after some time and this also happens with the BookArc.

Will my macbook overheat with the BookArc with three external displays and cpu intense work?

Thanks!

Ps. I use a MacBook Air BookArc with my 15" rMBP.
Stop throwing the word overheating around. It's (wrongly) overused around here.

That's not what's happening. If you computer was truly overheating, it would shut down out of the blue with no prior warning to prevent damage.

Driving that many displays requires power, power generates heat as a byproduct, said heat needs to be extracted for the electronics to work properly, the fans kick in.

Your computer is working as designed, and you have nothing to worry about.
 
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iConnected

macrumors 6502a
Feb 17, 2011
667
413
If you use a BookArc that's intended for a larger model (and/or just use a different insert), you should be able to keep the lid cracked open a couple of centimetres or so (for better heat dissipation) without activating the internal display.
 
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ApoorvPrem

macrumors regular
Dec 25, 2011
181
12
India
I have a question regarding the BookArc and i don't think it deserves its own thread.

Do many people use the BookArc? and if you reply please state if you use/used a BookArc.
Isn't the BookArc a total construction failure?
The Macbook has the air intakes on the side and the hot air goes out through the Display Hinge.
Doesn't this stress the Macbook more than normal, because hot air travels up and if you use the BookArc and Macbook in the correct orientation (like in the marketing photos) it works against the thermal design of Apple?
Cant we use it upside down? As in the Mac.
 
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wuush

macrumors member
May 4, 2014
76
9
Cant we use it upside down? As in the Mac.

You could, except with the Macbook Air insert.

If you use it as designed (apple logo in correct orientation), the bookArc design works against the thermal design of the macbook. Atleast thats what i think will happen:
 

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ckWTB

macrumors member
Aug 24, 2014
33
13
Portland, OR
Hey there,

I just bough a third monitor and want to use my MacBook in clamshell mode with the BookArc. Most of the time when using an external Monitor my fans will start kicking in after some time and this also happens with the BookArc.

Will my macbook overheat with the BookArc with three external displays and cpu intense work?

Thanks!

Ps. I use a MacBook Air BookArc with my 15" rMBP.

Running multiple displays will require additional processing power and therefore will generate addition heat. Depending on the laptop model (Pro, Air, processor speed, etc) and the tasks you are running (light, moderate or heavy workloads), the amount of heat being generated may exceed the laptop abilities to remove the heat, which will cause the laptop to throttle processor speeds, leading to reduced performance. Just about all laptops will throttle and slow performance when pushed hard enough and for long enough. If your fans are running on high for extended periods of time then there is a chance throttling is taking place. You can find out if your laptop is throttling by installing Intel’s free Power Gadget application: https://software.intel.com/en-us/articles/intel-power-gadget-20

Every laptop comes with different built-in cooling capacity as well as a slightly different cooling configuration. The 15-inch MacBook Pro with Retina Display has two large fans that exhaust heat at both ends of the rear hinge and pull cool air through the primary intake vent located in the center of the rear hinge (between the two exhaust fans), as well as through the smaller intake vents located along the laptop sides. The 15-inch MacBook Pro with Retina Display has the largest built-in cooling capacity but it also generates the most heat, which is a significant amount of heat when running under heavy workloads, enough heat that throttling can occur. Every laptop has different fan/vent configurations, including the MacBook Airs. iFixit is a great place to see the fan/vent layouts for all current and past laptops: https://www.ifixit.com/Device/Mac_Laptop
 
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chmodme

macrumors member
Oct 19, 2012
78
2
Late to the thread. I've used this device for four plus years. I edit video almost every day, and yes, the fans run as designed. I use it UPSIDE down, so the heat can leave normally.

Ignore the stupid Marketing images. It makes NO SENSE to use it with the vents facing down.
 
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ApoorvPrem

macrumors regular
Dec 25, 2011
181
12
India
Late to the thread. I've used this device for four plus years. I edit video almost every day, and yes, the fans run as designed. I use it UPSIDE down, so the heat can leave normally.

Ignore the stupid Marketing images. It makes NO SENSE to use it with the vents facing down.
Just to be clear - The hinge at the top, right ?
 
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sauria

macrumors regular
Jul 2, 2001
235
20
Texas, USA
Late to the thread. I've used this device for four plus years. I edit video almost every day, and yes, the fans run as designed. I use it UPSIDE down, so the heat can leave normally.

Ignore the stupid Marketing images. It makes NO SENSE to use it with the vents facing down.
Great advice, seems better this way on the 2019 MBP 16" -- no blocked vent areas this way.
 
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