Casing airflow

[xnoobftw]

Hey guys! I have a carbide spec 03 and a r9 290x (this thing spews out lava like a beast). When i put my hand over the top exhaust fans, i realised there is only hot air coming out of the one nearer to the rear while cold air comes out of the one. Should i change that from exhaust to intake instead for fresh air? (I have a hyper 212x installed on the CPU (i5 4440))

[Ex0Thermic]

you can try moving the fan to the front off the case so you have 2 fans pushing cold air in.
(I wouldn't use a top fan as intake unless your using both top fans as intakes for static pressure)

[ManWithBeard1990]

You can switch it off if you want. If you suspect a fan is being counterproductive try and see if it works without it before flipping it over. It'll make your rig all the more quiet. My pc has 9 case fans but only 6 of them are running atm.

[BaSkA]

you can try moving the fan to the front off the case so you have 2 fans pushing cold air in.

(I wouldn't use a top fan as intake unless your using both top fans as intakes for static pressure)

 

If I understand right, only the top exhaust fan closer to the heat (CPU, GPU, MOBO) is actually exhausting hot air...

I guess that's to be expected since there's not much heat to the front of the CPU given that there aren't many HDDs, etc.

You can use that top exhaust fan to control your case pressure. But, if you don't really care for that, make sure that you have front/bottom intake and rear/top exhaust and you'll do fine, as @GeekThief said!

 

If you have more air coming in than coming out, you have positive pressure: (usually) hotter case temps but less dust. Negative pressure: (usually) lower case temps and dust comes in through every tiny hole in the case.

[xnoobftw]

If I understand right, only the top exhaust fan closer to the heat (CPU, GPU, MOBO) is actually exhausting hot air...

I guess that's to be expected since there's not much heat to the front of the CPU given that there aren't many HDDs, etc.

You can use that top exhaust fan to control your case pressure. But, if you don't really care for that, make sure that you have front/bottom intake and rear/top exhaust and you'll do fine, as @GeekThief said!

 

If you have more air coming in than coming out, you have positive pressure: (usually) hotter case temps but less dust. Negative pressure: (usually) lower case temps and dust comes in through every tiny hole in the case.

I have it in a way such that when i'm gaming it turns negative pressure (The exhaust fans cranks up) and while i'm not under load it's positive (intake fans are on 100%)

[spartaman64]

you can try moving the fan to the front off the case so you have 2 fans pushing cold air in.

(I wouldn't use a top fan as intake unless your using both top fans as intakes for static pressure)

? why would you use static pressure for top fans there isnt very much resistance is there?

[BaSkA]

I have it in a way such that when i'm gaming it turns negative pressure (The exhaust fans cranks up) and while i'm not under load it's positive (intake fans are on 100%)

 

That's a pretty awesome idea! Can you tell me how you're going to do that? Like, which software or manually through a PWM controller?

 

 

? why would you use static pressure for top fans there isnt very much resistance is there?

 

To control the pressure inside the case, if I had to guess... And there's some resistance from the top of the case(mesh, structure, etc), if it's used as an intake I believe.

[spartaman64]

That's a pretty awesome idea! Can you tell me how you're going to do that? Like, which software or manually through a PWM controller?

 

 

 

To control the pressure inside the case, if I had to guess... And there's some resistance from the top of the case(mesh, structure, etc), if it's used as an intake I believe.

static pressure is sort of misleading as it isnt any better at changing case pressure its only for places with high resistance as in radiators or with hard drive cages in fact in a open place air flow fans are better than static pressure fans at moving air thus changing pressure

[BaSkA]

static pressure is sort of misleading as it isnt any better at changing case pressure its only for places with high resistance as in radiators or with hard drive cages in fact in a open place air flow fans are better than static pressure fans at moving air thus changing pressure

 

I never meant that a static pressure optimized fan is better at changing the pressure inside a case.

 

I believed that, if the fan had to make the air flow through the mesh, top of the case, HDD cages, etc, it would work better than a regular "airflow" fan.

[xnoobftw]

That's a pretty awesome idea! Can you tell me how you're going to do that? Like, which software or manually through a PWM controller?

 

 

 

To control the pressure inside the case, if I had to guess... And there's some resistance from the top of the case(mesh, structure, etc), if it's used as an intake I believe.

I have the exhaust connected to the MOBO fan connectors and i use speedfan to config the speed of the fans (it cranks up to 100 percent automatically when underload and hovers around 30-40 percent when idle) And yes i have sp 120s as exhaust even tho i have no radiators (There are dust filters tho)

[xnoobftw]

static pressure is sort of misleading as it isnt any better at changing case pressure its only for places with high resistance as in radiators or with hard drive cages in fact in a open place air flow fans are better than static pressure fans at moving air thus changing pressure

I dont think it really matters in the end....

[spartaman64]

I dont think it really matters in the end....

of course it matters between static pressure and airflow

[xnoobftw]

of course it matters between static pressure and airflow

Well the job of fans is just to displace air.... And my SP120s are doing a pretty good job so yeah!

[xnoobftw]

You can switch it off if you want. If you suspect a fan is being counterproductive try and see if it works without it before flipping it over. It'll make your rig all the more quiet. My pc has 9 case fans but only 6 of them are running atm.

But my situation is where i dont feel heat coming out of the exhaust fan nearer to the front while the top fan (nearer to the rear) is exhausting lava out. I'm asking whether should i flip the exhaust top fan nearer to the front to intake more cool air?

[ManWithBeard1990]

What are your temps?

[xnoobftw]

What are your temps?

CPU: 32 degrees when idle, around 50 when under load

GPU: 40 degrees idle, around 65 underload

Ambient: 28 degrees 

(All degrees are in Celsius)

[xnoobftw]

What are your temps?

Sorry! GPU is 70 under load!

[ManWithBeard1990]

Sorry! GPU is 70 under load!

Yeah don't worry about it. That's very reasonable for an r9 290x.

[xnoobftw]

Yeah don't worry about it. That's very reasonable for an r9 290x.

But would it be better if i had the exhaust top fan (which isnt exhausting alot of hot air) to be set as intake so i get better tempts? Or is it not needed?

[ManWithBeard1990]

But would it be better if i had the exhaust top fan (which isnt exhausting alot of hot air) to be set as intake so i get better tempts? Or is it not needed?

It's not needed. But you can always try. It may lower your cpu temps but for your gpu it probably won't make much difference.

[xnoobftw]

It's not needed. But you can always try. It may lower your cpu temps but for your gpu it probably won't make much difference.

ah thank you that is an answer i am looking for