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PWM 120mm case fans w/ high static pressure

post #1 of 13
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Hi guys,

I have a mini P180B which has two front 120mm fan locations.

673

The fan covers also include a dust grill as well so I need some fans with some high static pressure values to pull air through easily. I also want to take advantage of advanced fan control that 4-pin PWM fans provide. They also need to be black to satisfy my aesthetic needs (noctua makes great fans, just ugly). I want to get the best performance at the lowest volume.

These are my only two intake fans, I also have a 220mm antec and a 120mm exhaust fans, so these need to keep up with those exhausts (I dont think they are right now...)

Anyone have any recommendations?
    
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post #2 of 13
Akasa apache fans are similar to noctuas and are 4 pin n black n cheaper than noctuas
post #3 of 13
I don't have any recommendation for a PWM case fan. I haven't seen the dust grill but I guess they are quite fine. You won't need high static pressure fans to do the job.

If it was on a heatsink by example I would agree but in a case you only need the air to move. You need some intake to prevent hot air to stay in the case.
Any cheap PWM case fan will do the job. If you really want to have high static pressure when you want it then take a PWM with high RPM. I wouldn't put more than 15$ for a case fan.
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post #4 of 13
Quote:
Originally Posted by richie_2010 View Post

Akasa apache fans are similar to noctuas and are 4 pin n black n cheaper than noctuas

^ +1.

http://www.akasa.com.tw/update.php?tpl=product/product.detail.tpl&no=181&type=Fans&type_sub=PWM%20Control&model=AK-FN058

330

These are good fans.
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post #5 of 13
Thread Starter 
Quote:
Originally Posted by Just a nickname View Post

I don't have any recommendation for a PWM case fan. I haven't seen the dust grill but I guess they are quite fine. You won't need high static pressure fans to do the job.
If it was on a heatsink by example I would agree but in a case you only need the air to move. You need some intake to prevent hot air to stay in the case.
Any cheap PWM case fan will do the job. If you really want to have high static pressure when you want it then take a PWM with high RPM. I wouldn't put more than 15$ for a case fan.

I guess I don't understand the difference.

I thought you needed high static pressure when there is a lot of resistance against the fan like the fine grill-mesh of a radiator.

400

700

Those are what we are dealing with. This isn't even including the solid door in front of the filters! I think there is a lot of restriction to these intakes, and that's what makes me think I need more static pressure than what comes with Antec's tri-cool fans.
    
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post #6 of 13
Check out these fans. I've got 4 of them for my Fractal Design Arc Midi all set to intake. They pull air through the front and top filters and I mean pull. These guys move air through a filter better than my Scythe Slipstreams did without a filter. They are loud-ish at full speed but you've already got a fan controller. I've got mine on a controller as well and I keep them at about 60-70% and noise is not an issue. Great fans.

And high static pressure does indicate better air flow through resistance. That's the whole reason I got these fans specifically, to pull air through a filter and still push it through a radiator with ease. CFM doesn't mean crap if you've got a ton of resistance, that's what static pressure is for.
Edited by LazarusIV - 4/16/12 at 12:13pm
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post #7 of 13
Thread Starter 
Quote:
Originally Posted by LazarusIV View Post

Check out these fans. I've got 4 of them for my Fractal Design Arc Midi all set to intake. They pull air through the front and top filters and I mean pull. These guys move air through a filter better than my Scythe Slipstreams did without a filter. They are loud-ish at full speed but you've already got a fan controller. I've got mine on a controller as well and I keep them at about 60-70% and noise is not an issue. Great fans.
And high static pressure does indicate better air flow through resistance. That's the whole reason I got these fans specifically, to pull air through a filter and still push it through a radiator with ease. CFM doesn't mean crap if you've got a ton of resistance, that's what static pressure is for.

Thanks, Ill take a look at those, too. They have higher pressure than the Akasa's. The pictures above were just scalped from other forums, they aren't actually of MY system.

I don't plan on using a controller with these fans but rather just a mobo fan header and speedfan/bios controls, so that's another consideration.
    
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post #8 of 13
Quote:
Originally Posted by killnine View Post

Thanks, Ill take a look at those, too. They have higher pressure than the Akasa's. The pictures above were just scalped from other forums, they aren't actually of MY system.
I don't plan on using a controller with these fans but rather just a mobo fan header and speedfan/bios controls, so that's another consideration.

If you won't be putting these on a controller then you might not want to get the Bgears fans. If they ramp up to full speed they'll be louder than the Akasas and it seems like lack of noise is important to you. I'd only get them if you put them on the fan controller... but they are great fans!
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post #9 of 13
Quote:
Originally Posted by killnine View Post

I guess I don't understand the difference.
I thought you needed high static pressure when there is a lot of resistance against the fan like the fine grill-mesh of a radiator.
Those are what we are dealing with. This isn't even including the solid door in front of the filters! I think there is a lot of restriction to these intakes, and that's what makes me think I need more static pressure than what comes with Antec's tri-cool fans.

Static pressure is the pressure air puts on an object. Higher the static pressure is more the air "wants" to pass through it. Fans are better pushing air and quite bad at pulling it when it is passing through an obstacle. Higher the RPM is, higher the static pressure is. Some fans design are better (larger, blade dimensions, number, etc). In your case, what ever you will do won't make big difference. Only thing that is really going to change something is the RPM.
Pulling fans have minimal static pressure. So again, no matter which fan you will take, if you want higher flow you will have to go for higher RPM fans, not higher static pressure fans.

Edit: If you don't believe me, think at what the fan has to deal with.

Pushing: High pressure => obstacle => lower pressure (difference = static pressure).

Pulling: Normal pressure (ambient air) => obstacle => lower pressure (static pressure obviously lower in the second case).

Air flow: High pressure to low pressure.

I know it is not 100% exact, there is more things to take in consideration, but in the case of pulling, the fan is blowing less air than it could, not because it is restricted but because there is less air available aka lower pressure since it is blowing all the air present. The pressure difference with ambient air and fan will create the air flow.
Edited by Just a nickname - 4/16/12 at 1:22pm
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post #10 of 13
Thread Starter 
Quote:
Originally Posted by Just a nickname View Post

Static pressure is the pressure air puts on an object. Higher the static pressure is more the air "wants" to pass through it. Fans are better pushing air and quite bad at pulling it when it is passing through an obstacle. Higher the RPM is, higher the static pressure is. Some fans design are better (larger, blade dimensions, number, etc). In your case, what ever you will do won't make big difference. Only thing that is really going to change something is the RPM.
Pulling fans have minimal static pressure. So again, no matter which fan you will take, if you want higher flow you will have to go for higher RPM fans, not higher static pressure fans.

A more rep-worthy post has not cross my desk in a long while. Thanks +rep
    
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