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Case Fans?

post #1 of 9
Thread Starter 
I have an NZXT Alpha, which as 2 Case fans...

#1. Should these fans be pushing air in the case or pulling it out of the case? (or one of each?)

#2. Is there a way switch the direction of the fan... (IE trun plug around or something)

#3. If I get a CPU Color that stands up with a fan on it, should I put it so that it blows the cool air @ (GPU, Rear Case Fan, or Drive bays)? Not even sure I will be able to point it but just in case what is the best idea?
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post #2 of 9
Quote:
Originally Posted by 2Late4Me View Post
I have an NZXT Alpha, which as 2 Case fans...

#1. Should these fans be pushing air in the case or pulling it out of the case? (or one of each?)

#2. Is there a way switch the direction of the fan... (IE trun plug around or something)

#3. If I get a CPU Color that stands up with a fan on it, should I put it so that it blows the cool air @ (GPU, Rear Case Fan, or Drive bays)? Not even sure I will be able to point it but just in case what is the best idea?
lol sorry bout that...just flip the fan. the sticker-side is the side it blows to
1 in and 1 out. for a nice flow.

and most systems (almost all systems) have front intakes and rear exhaust
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post #3 of 9
Quote:
Originally Posted by 2Late4Me View Post
I have an NZXT Alpha, which as 2 Case fans...

#1. Should these fans be pushing air in the case or pulling it out of the case? (or one of each?)

#2. Is there a way switch the direction of the fan... (IE trun plug around or something)

#3. If I get a CPU Color that stands up with a fan on it, should I put it so that it blows the cool air @ (GPU, Rear Case Fan, or Drive bays)? Not even sure I will be able to point it but just in case what is the best idea?
To answer your questions-

1. The agreed optimum would be to have the front fan as an intake and the rear fan as an exhaust, that helps to draw air through the case with minimal turbulence

2. No - You just need to unscrew the fan and flip it so that the air blows (or sucks) the other way.

3. This is debated alot. Ideally you want the rear fan to assist the heatsink fan. So the heatsink's fan should point towards the front of the case blowing air towards the rear fan for the air to be exhaused.
Edited by coffeejunky - 6/17/08 at 5:47am
post #4 of 9
1- One of each, front intake back exhaust

2- Has been answered, just flip it around. No inverting the current lol.

3- Have it blowing to the back to keep the airflow constant. If you have it facing anywhere else, this cn disrupt airflow and cause hot-spots to be born, increasing the overall ambient temperature in the case.
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post #5 of 9
I just took a look at the Alpha...and from what it looks like to me is that it has a side intake and a rear exhaust. Not exactly the best intake setup - but not the worst either. The cool air coming in enters right at the Heatsink...so it keeps the CPU cooled...but not much else.

From what it looks like - there is a mounting place in front of your HDD cage to mount another fan. I would suggest installing either a 90mm or 120mm fan there (whichever it fits) to increase the cool air intake to the rest of the components.

Airflow boils down to this:
You can either have balanced (exactly the same air going out as you do coming in), Negative Airflow (more being exhausted then coming in), or Positive airflow (more coming in then going out). I think most would agree that balanced or Negative is the best way to have it. It literally keeps the air Sucking through from front to rear and tends to keep temps lower. The downside is that it creates more dust in your rig - but a can of spray air and thats fixed.
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post #6 of 9
Thread Starter 
Guys thanks for your insight.

I actually opened up my case and checked it out... Currently side panel fan is intake, back is exhaust, but also PSU is exhaust so I would guess this makes a negative pressure??? I will try to pull another case fan out of my wifes pocket book but she can have a pretty tight grip on those things some times.

I installed a ASUS Triton70 cooler last night and notice that for what ever reason (I guess additional air movement) my GPU cooled a couple of degrees too. Due to mobo layout I could not get the cooler pointed towards rear case fan... but I was able to point it towards PSU... So I hope that will work ok. Seemed to during a short test last night.
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post #7 of 9
#1. If the exhaust fan has adjustable speeds set it a notch higher than the intake fan (which should be in the front sucking air in of course).
#2. Answered
#3. Answered
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post #8 of 9
Thread Starter 
Ok.. So on my NZXT Alpha I have:
Side fan for intake
Rear fan for exhaust
PSU acts as exhaust fan

If I add a frount fan for more intake would it help or would it upset the balance...

Also the case has about a 3 inch open grill next to the expansion slots would an intake or exhaust fan (like 2 - 60mm fans) be good there.
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post #9 of 9
Adding a front fan for intake would work great seeing as you have more exhaust, and adding one or two 60mm fans in the PCI area would also help.
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