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Airflow question for the Qpack (

N

Nakamori

Gawd
Joined
Jun 11, 2005
Messages
530
Hey guys, I was looking at ways to better cool my Qpack case, and I'm thinking about turning the 120mm fan in back around so it pulls (hopefully cold) air into the system so the airflow goes from the back to the front.

Here is a reference photo:
DSC00058.jpg


Now the default scenario, with the rear fan blowing air out of the system:
Airflowtowardback.jpg

My thinking is because of the large distance between the vents and the HSF, not a lot of that cold air will reach the heatsink, instead getting caught in the crevices of other parts of the mobo.

This is what I'm thinking about having happen:
Airflowtowardfront.jpg

Now, with this configuration the cool air intake (in this case the fan instead of the vent) is right on top of the HSF. This means that nearly all of the cool air coming in the case will contact the HSF and the warm air coming up off it. This air will then be pushed out the vents. In essence, the vents and 120mm fan switch roles.

Are my diagrams accurate in how the airflow goes in these scenarios? If you guys have any input on which way I should do it, please reply. Here is a little tablet to show your ideas:
Airflow.jpg
 
Heh, those drawings dont make any sense. If your heatsink is blowing air INTO your CPU, how is air gonna radiate outwards from the fan? You cant have the fan blowing in both directions.
 
2uantuM said:
Heh, those drawings dont make any sense. If your heatsink is blowing air INTO your CPU, how is air gonna radiate outwards from the fan? You cant have the fan blowing in both directions.
Click to expand...

The fan blows down on the heatsink that is heated up by the cpu. The air passes through the heatsink's corridors then radiates up from the bottom.
 
While the fan is spinning? Heat rises, but not with that much force. The heat will radiate from the sides, but you have the air radiating through the fan.

Yours will look like this

yours.JPG


Personally, I think your scenario is better even from a dust perspective -- you're creating a positive pressure inside the case.
 
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