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Bought brand new case, but case fans are blowing air outwards not inwards? - Page 3

post #21 of 29
Quote:
Originally Posted by audioxbliss View Post
Here's my cooling setup:



I don't technically have any exhaust fans. As it is, though, my "pull" fan on the cooler blows air straight out the back, making it ALMOST an exhaust fan but not quite.
My airflow is like this. If you look at item 2 in my sig you can see that a heatsink pull fan can really be a case exhaust fan (this was a test, not a working configuration).

Quote:
Originally Posted by a pet rock View Post
Mmmm no case exhaust. Anyways, I dislike the idea that "well since heat rises your top fans should exhaust". That's just bullcrap. Air goes where you push it, and most fans suck at pushing air straight up.

I took my top two exhaust fans, turned them around to intake and it dropped all my temps by ~5C. However, I tried ehume's idea of no case exhaust and it raised my temps ~5C. This is probably just because my heatsink is passive, it needs the help getting rid of hot air.
Given that the most effective heatsinks have push and pull fans, it makes sense that your passive heatsink would need a push fan (from your case intake) and a pull fan (from your case exhaust).

I would advise that you try moving your case exhaust fan to be a push fan on your heatsink. Passive heatsinks are nice for silent builds, but when you have case fans your rig is not silent.

A case exhaust fan is on the outside of a case, making noise. That same fan in the case's interior would have its noise muffled.

As always do the rearrangements and test the results.
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post #22 of 29
Quote:
Originally Posted by KILLER_K View Post
Well we all know hot air rises.
this is NOT how airflow in a confined area, like a case, works. air will flow where you direct it.
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post #23 of 29
Quote:
Originally Posted by ehume View Post
Given that the most effective heatsinks have push and pull fans, it makes sense that your passive heatsink would need a push fan (from your case intake) and a pull fan (from your case exhaust).

I would advise that you try moving your case exhaust fan to be a push fan on your heatsink. Passive heatsinks are nice for silent builds, but when you have case fans your rig is not silent.

A case exhaust fan is on the outside of a case, making noise. That same fan in the case's interior would have its noise muffled.

As always do the rearrangements and test the results.
Well, right now the biggest problem with noise is the CF 6850s. Those suckers are loud. Getting two TTPs to help reduce noise. I really just want to run it passive because it's so ridonculous. When my budget allows it, I'll be looking into some new case fans that'll help with noise as well.

Oh, and the 120mm is noticeably louder than my 3x140s. When I took it out to test temps, I could tell it wasn't there anymore.
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post #24 of 29
Quote:
Originally Posted by a pet rock View Post
Well, right now the biggest problem with noise is the CF 6850s. Those suckers are loud. Getting two TTPs to help reduce noise. I really just want to run it passive because it's so ridonculous. When my budget allows it, I'll be looking into some new case fans that'll help with noise as well.

Oh, and the 120mm is noticeably louder than my 3x140s. When I took it out to test temps, I could tell it wasn't there anymore.
Well, there you are. Get a nice AP-13 for your HR-02 and you'll have a very quiet rig.

And perhaps if the 140mm's are loud enough you wouldn't notice an AP-14.
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post #25 of 29
Yeah, I'm thinking about getting some slow speed yates for the case fans. Need the blue LEDs for the ladyfriend. If the GTs get back in stock I'll probably buy one for the case exhaust. And I'm thinking about getting a TY-140 to hide in my 5.25" drive bay. Just not too sure how I'd get it to sit still.
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post #26 of 29
Quote:
Originally Posted by ehume View Post
My airflow is like this.
This is because you recommended it to me
post #27 of 29
Quote:
Originally Posted by a pet rock View Post
Yeah, I'm thinking about getting some slow speed yates for the case fans. Need the blue LEDs for the ladyfriend. If the GTs get back in stock I'll probably buy one for the case exhaust. And I'm thinking about getting a TY-140 to hide in my 5.25" drive bay. Just not too sure how I'd get it to sit still.
Depending on your price sensitivity, you might go with an Aerocool Shark Blue Edition for a quiet LED fan. I'm using it with its resistor wire (see item 4 in my sig) and it's nice and quiet with zero ticking. My Yate Loon lowspeed fans are still around 1200 rpm, and they click when undervolted.

I'd recommend window foam or some other structural foam to mount a fan in the 5.25 bay. Here's one from our forums:




Here's the Shark I put in my case last night:



The sides are from some structural foam - old packing for some electronic device. The top is from a roll of window sealing foam I got from Home Depot years back.

Just remember a 140mm fan will need four available slots.
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post #28 of 29
I don't even have a fan controller, so I wouldn't be able to undervolt them. I'd just get the 1000RPM ones. Unless the sharks are actually quieter with more airflow, I don't see the point.
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post #29 of 29
Quote:
Originally Posted by a pet rock View Post
I don't even have a fan controller, so I wouldn't be able to undervolt them. I'd just get the 1000RPM ones. Unless the sharks are actually quieter with more airflow, I don't see the point.
With the resistor wire, the Sharks are quieter with at least as much airflow.
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