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Can someone explain me Linus video about Push/Pull?

Evoly
By Evoly
in Cooling
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Posted

Hey there. I currently struggle a bit to understand this video at around 3:40:

 

 

Does his "usually in pull" means that he does put the "case -> pull fan -> radiator" config to pull the air from the case out or does that mean that he runs it in "case -> radiator -> pull fan" to pull fresh air from the outside throught he radiator into the case? 

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Push/pull is usually relative to radiators, so pull would mean case > rad > fan. And yeah, the fan pulls air from the case through the radiator (if you gonna do otherwise you're basically going to keep all the heat CPU produces in the case and then you're gonna have a bad time).

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The configurations you described seem to be push...

Pull means you put the fans "behind" the rad and make them suck air away from it.

 

A really quick drawing in case my english is as poor as I think:

post-489-0-97736300-1425078204.png

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It doesn't matter where the radiator is positioned, what Linus is saying is that the fans must be pulling air through the radiator instead of pushing it in.

 

post-489-0-97736300-1425078204.png

 

^good drawing^

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Push= the air flow created by the fans are pushed into the radiator.

Pull= the air flow created by the fans are pull away from the radiator.

Around 3:40 when Linus mentioned, "run in pull" means fans first and then radiator, so hot air gets pull through the radiators and exhausted out of the case by the fans. This method is easier to clean out the dust from the rads, as there won't be any fans in the way.

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Isn't it a bit "meh" to use the hot air in the case to cool the radiator? If I look at my planned airflow I tend to play with the idea to use the rear exhaust as intake. Now after I guess that I did understand how to position the Radiator. Damn its pretty hard to get a clue if you haven't seen it in Live.

 

http://i.imgur.com/vFkBS9s.jpg

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Isn't it a bit "meh" to use the hot air in the case to cool the radiator? If I look at my planned airflow I tend to play with the idea to use the rear exhaust as intake. Now after I guess that I did understand how to position the Radiator. Damn its pretty hard to get a clue if you haven't seen it in Live.

 

http://i.imgur.com/vFkBS9s.jpg

It depends on the configuration. It may be more optimal to exhaust warmer air than fill the case with warmer air for other components. 

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