How should I set up my Intake/Outake fans?

[VictoryCoffee]

Hey guys, I have this case:

http://www.newegg.com/Product/Product.aspx?Item=N82E16811147216&cm_re=rosewill_legacy-_-11-147-216-_-Product

Which only has intakes/outakes for fans on the back of the case. It has 3 places to mount an 80 mm fan. I have 3 fans to install in it, but i'm just not sure which should be intake and which should be outtake.

Here's a picture of the back with said fan locations:

Any suggestions?

 

[Kingbob]

The lower right should be intake and the other two should be outtake. It's not a great solution, but it makes sense in this case. Also, if there is enough ventilation you could make all three outtake fans.

 

[VictoryCoffee]

The lower right should be intake and the other two should be outtake. It's not a great solution, but it makes sense in this case. Also, if there is enough ventilation you could make all three outtake fans.

Would you mind expanding on this/why to set it up this way? I've asked around in several places and I've gotten different answers every time haha. I'll be running a 750ti in it, so my gpu shouldn't be getting all that warm, but it seems to make sense to have the intake near that.

 

[VictoryCoffee]

Help me Tom's Hardware, you're my only hope.

 

[DonkeyOatie]

Hot air is less dense than cold air, so it rises. Accordingly, the intake for the cold air goes in low where it is warmed in the case, naturally rises, and is exhausted from higher up. You are using the forces of physics to help the air flow.

The Silverstone FT03 mini is very small but comparatively well ventilated because it acts like a chimney; cold air in the bottom, hot air out of the top.

 

[VictoryCoffee]

Hot air is less dense than cold air, so it rises. Accordingly, the intake for the cold air goes in low where it is warmed in the case, naturally rises, and is exhausted from higher up. You are using the forces of physics to help the air flow.

The Silverstone FT03 mini is very small but comparatively well ventilated because it acts like a chimney; cold air in the bottom, hot air out of the top.

This seems to be the general sentiment, from what I understand, but I guess in reality (as others have explained to me) that "hot air rises" actually doesn't have a whole lot of effect on the temps in a pc.

Linus outlines it here:
[video="https://www.youtube.com/watch?v=g8EN3K-eaVA"][/video]

So I'm still stuck in a hard place. Everyone seems to disagree on this!

 

[VictoryCoffee]

Any other ideas??

 

[DonkeyOatie]

I responded with a long post earlier that seems to have disappeared. Perhaps I said something controversial.

Heat rising is a different issue to positive and negative pressure.

Positive pressure helps keep a case from getting full of dust. More air is drawn in than the exhaust fan would normally expel and the extra air leaks out every opening in the case, preventing dust from getting in, provided that the air intake is filtered.

I have seen no evidence that Positive or Negative pressure makes a significant difference to cooling, in general. Every computer has a different case, different fans, different components, different use, a different environment, and different cable management, and I believe that these are much more important than the difference between positive and negative pressure as far as cooling is concerned.

Your case, in particular is unfortunate with the three fans close together and on one side, a lot of the cool air will be immediately expelled without getting a chance to reach the parts that need it.

A question I should have asked is What are you going to put in the case?