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Leaving Laptop Back Cover Off to Lower Temps - Is it okay ?

post #1 of 13
7/13/09 at 5:57pm
Thread Starter 
Or is it a bad idea?
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post #2 of 13
7/13/09 at 6:35pm
which... part do you mean, exactly? I'm not able to picture what you're trying to do...
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post #3 of 13
7/13/09 at 6:38pm
Can you be more specific? How is your laptop set up currently? You may be creating issues by leaving the cover off depending on what is under that cover, what is around the laptop, etc. Pics would be helpful.
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post #4 of 13
7/13/09 at 6:47pm
Thread Starter 


something like this if i took off the back covers and the laptop is on a desk
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post #5 of 13
7/13/09 at 8:57pm
You could risk making the active cooling system inefficient. I mean if the fans create anything similar to a "wind tunnel". And if the Active is not functioning correctly it will have an effect on the passive. With out adding some other airflow I am not sure if you will benefit? And I don't think leaving those parts exposed is the safest idea.

Then again if you are a careful person by all means try. Just test temps and see if it does or does not help?
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post #6 of 13
7/13/09 at 9:05pm
Thread Starter 
it does help, when i took off the back cover the temps went down by 5 degrees
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post #7 of 13
7/13/09 at 10:10pm
Quote:
Originally Posted by tomotomo View Post
it does help, when i took off the back cover the temps went down by 5 degrees
Idle or load? Idle does not matter.
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post #8 of 13
7/13/09 at 10:12pm
Thread Starter 
during idle
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post #9 of 13
7/13/09 at 10:29pm
Test under load that really is the important temp. Say orthos?
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post #10 of 13
7/13/09 at 11:10pm
Generally, that will help your temps by a few degrees. I don't think it's a good idea to do that because you are exposing your mobo and all the components to foreign matter, including charged dust or metal objects. A better way to keep it cool is keep the notebook in cool environments, and help circulate the air by raising the notebook or using a cooling pad with fans.
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post #11 of 13
7/14/09 at 12:06am
To get back on my point about idle vs load. Notebooks at idle should only be using what I call the passive thermal solution. Fans should not be running at idle.

So the heatsink through primarily conduction and convection and to a lesser extent radiation cool.

Add to that a heat pipes, pipe contains a relatively small quantity of a "working fluid" or coolant (such as water, ethanol or mercury) with the remainder of the pipe being filled with the vapor phase of the working fluid, all other gases being excluded. The advantage of heat pipes is their great efficiency in transferring heat.

Your removal of the back of notebook is all fine and maybe better at this point.

This is where you lose and mostly under load. Forced air cooling. If there is more air being forced into a system than being pumped out (due to an imbalance in the number of fans), this is referred to as a 'positive' airflow, as the pressure inside the unit is higher than outside. A balanced or neutral airflow is the most efficient, although a slightly positive airflow results in less dust build up.

You lose that when you open up the case. Also this final variable complements the effectiveness of the others.

Test under load.
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post #12 of 13
7/14/09 at 4:42am
Simply take off the botton cover will cool slightly because the hot air doesn't trap inside. But by adding a small 140mm USB fan will circulate the botton airflow. Therefore improved the cooling efficiency by alot more.

I personally have a 200mm system fan under my laptop, for now i think is waste because is too big. A single custom 140mm is the right size and suggested laptop cooler pad is good idea too.
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post #13 of 13
7/14/09 at 7:40am
Remember doing that with my Sager ... Did not help much when under load or gaming, but just by elevating the back side up 15mm, with the cover back on, it runs coooooool!

cheers ...
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