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Feedback on Air Cooling Experiment

post #1 of 2
Thread Starter 
Hello All!

This is my first cooling experiment, so here we go!

Objective: Utilizing maximum intake air flow, reduce system temps as low as possible

Materials: 120mm case fans, 3.5 > 5.25 bay convertor, 80mm case fan


Intake - Bottom X2, Top X2, Side(?), Front, 5.25 Bay(?)
Exhaust - Back, PSU(?), PCI Slot Area

1) Install fans as indicated
2) Remove PCI Slot covers to increase exhaust area
3) Move Hard Drive to 5.25 Bay or exterior (Hot Swap)

Current data at time of writing:
Room - 21C
CPU - 28C (Idle)
System - 27C (Idle)

Current Fan Configuration:

Intake - Bottom X2,Front
Exhaust - Top X2, Back
post #2 of 2
From what i can see, you are trying to make sure that there are no dead pockets of air in the case. I think air flow over critical areas is more so important than having dead spots of air. Though you have great coverage of areas that need air.This looks like it could get noisy.

I always try to match my intake and exhaust volume (mm and estimate cfm) so that i don't create any type of vacuum, thus creating a dead pocket of air.Keeping the air stream lined over the main components, and not worrying about cooling places without components that produce heat.

Also trying not to have two fans too close together creating turbulence, or having an intake right next to an exhaust.

but that's my two sense, i would love to hear others thoughts on this.

6. Positive and Negative Pressure - Personal Favorite (Positive)


If you have more CFM coming IN, then OUT, you will have hot air cycling in your case waiting to go out, called positive air flow. However, most hot air will be pushed out through your available exhaust fans.

The benefit of having a positive pressure case is that all of your intake air is being cycled in strictly from your intake fans which should have dust filters installed. Therefore, a positive pressure case tends to have much less dust then a Negative pressure case.


If you have more CFM pushing air OUT than IN. This makes a negative airflow.

Basically you need more air OUT, then goes IN using the fans. The additional air needed will be sucked through the mesh and other holes in your case. The benefit, in theory, is that more cold air is being pulled in through the extra gaps and therefore keeping things cooler than a Positive pressure case.
Edited by micro5797 - 9/3/11 at 8:08am
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