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Is this placement correct?

Bill_Bright said:
Positive pressure ensures all the air coming into the case is routed through the filters - and that is what you want. If "under" or "negative" pressure, you create a vacuum in the case. That is bad because then dirty air will try to get in through every crack, USB port, and connector. Not good.
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Thank you for that excellent explanation! I can reverse the top filter in order to increase the +pressure. But it is too hard to calculate the actual pressure since there are lots of other fans..

eidairaman1 said:
Make 1
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Since my case is Asus gt 301, I asked if there is a replacement part for this. They wanted $20 for that..
 
i see some on amazon...

Screenshot_20220306-224900_Chrome.jpg
 
freeagent said:
There is a good chance I would touch one of those fans inappropriately if you weren't looking.. or maybe even if you were..
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Phat Phinger Phrank. No-no touchy there! :p
 
mclaren85 said:
I've cut the magnetic dust filter. Is that the correct thing I've done?
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No sir, You should've just threw it away instead of cutting it.
 
Personally I keep the dust filters if they're on the top of the case. I mean, they're dust filters and I don't want to clean the system that often.
 
thunderingroar said:
i doubt that fan does anything to your temps. could potentially even make it worse since it just exhausts the fresh air from the front intake fans
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this, think of an elbow tube. If the front top fan is blowing in cool air than the roof front fan will just take that cooler air and suck it right out ensuring that cooler air does not get to your AMD wraith cooler.

Z-q45_jcpEx_.JPG



this article from bit tech still holds true even if it's ten years old. The two worst trends in PC case cooling (RGB has no cooling impact, I know shocking!) have been

1. closed off front panel with small slits for air flow, luckily most brands have gone against this look the last few years
2. a glass side panel that closes off the ability CPU & GPU fans have to pull in cooler air from the side

Article Summary below

So, that was an awful lot of testing and more than a few graphs, but what have we actually learnt? Well obviously we’ve found that more fans = more cooling.

This isn’t surprising or groundbreaking, but it’s good to know that you will get a direct benefit from adding an extra fan or two, which is more than can be said from adding an NPU to your case.

Beyond that we found that the placement of the fans you do have is important. It's almost more important than how many you have as we were - for example - able to achieve better cooling from three well placed fans than four poorly placed ones.

We also found that the amount of fans you’re using affects which mounts you should be using - some mounts were more useful with fewer fans, some with more.

As a result of this we’re able to fashion some simple air cooling principles which hopefully should be relevant to most builds and, as long as case design doesn’t change radically in the next few years, remain relevant for your next build too.


  • 1. The amount of venting in your case can have a huge impact on cooling, particularly around the CPU area. If you have fan mounts here that are blocked up, unblock them.

    2. Generally, all other things being equal, it’s better to get hot air out of your case than to pump cool air in, particularly when it comes to CPU cooling.

    3. If you have a roof mount that’s located nearer the front of the case than the CPU cooler, leave it open. Fitting a fan here only causes problems.

    4.     If you have one, two or three fans in your case, the side panel intake mount is the most important. Fill this first, followed by the rear exhaust mount, followed by the roof exhaust mount.

    5. Bear in mind the fact that fans have an effect on each other and use this to your advantage. For this to work though they need to be close enough to interact - a side intake works better with a rear exhaust than a front intake does for this reason.

    6. With four or more fans, concentrate on traditional front to back cooling and creating one strong, continuous air flow. Fill the front intakes and the roof and rear exhausts first.

    7. More fans does mean more cooling, but expect diminishing returns when going above three or four fans.


As we said, we’re confident these principles will hold true for the majority of you but, as ever, the best thing to do is experiment and see what works for you, your fans and your case. Now, if you don’t mind, we’re off for a well earned beer.


bit-tech.net

The Big Air Cooling Investigation | bit-tech.net

Ever wanted definitive answers on how best to air cool your PC, then look no further
bit-tech.net bit-tech.net

Bill_Bright said:
I hate fan noise. I mean I really HATE fan noise. If the case sits on or near the floor, a top mounted fan might be audible. And that would not be good, IMO.
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same, I find fan noise very distracting. Which is why I keep an exhaust fan over my CPU air cooler (roof rear fan). Along with the rear exhaust fan, the roof fan helps keep temps down and allows me to run my case & CPU fans at lower RPM keeping down noise.
 
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The top mesh filters are more to prevent debris from entering the case: like paperclips, food particles, pet hair, etc.

This is valid if the top fans are configured for exhaust or even when the system is turned off.
 
cvaldes said:
The top mesh filters are more to prevent debris from entering the case: like paperclips, food particles, pet hair, etc.

This is valid if the top fans are configured for exhaust or even when the system is turned off.
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My top fan is configured to work as an exhaust fan. What should I do then?
 
thunderingroar said:
i doubt that fan does anything to your temps. could potentially even make it worse since it just exhausts the fresh air from the front intake fans
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This tbh, maybe just put it in the back of the case?
 
It's always better to have exhaust there where the heat is gathering. I would put it to the back as well.
 
mclaren85 said:
I already have the back exhaust fan
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well you're good then, no need to put the top exhaust unless you're running negative pressure setup

anyway ive been running the NR200 case for a while now, giving me better thermals compared to my ATX setup (Corsair 275R) due to side exhaust :D
 

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NDown said:
well you're good then, no need to put the top exhaust unless you're running negative pressure setup
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So according to my set-up, which direction is better?
 

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mclaren85 said:
So according to my set-up, which direction is better?
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Hot air rises. Configuring the top fans as exhaust is more natural. You're not fighting physics.

In a typical PC case, the hottest components (graphics card GPU, CPU, and motherboard VRM) are in the upper left quadrant. The rear fan and top fan toward the back are best utilized as exhaust to get that heat out of the case as quickly as possible with the least amount of distance that the air needs to travel.
 
Hi,
I always use top and front as intake they are both filtered for a reason, it's funny to see people filtering exhaust air :laugh:

But if switching top to exhaust all you really should do is remove the filter not cut it.
 
ThrashZone said:
Hi,
I always use top and front as intake they are both filtered for a reason, it's funny to see people filtering exhaust air :laugh:

But if switching top to exhaust all you really should do is remove the filter not cut it.
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I'm not filtering the outgoing air but it looks like this. Do you think it looks normal?
 

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Hi,
Besides cutting instead of simply removing the filter yes

If the other fan next to it is intake you could of used a verity of materials to filter it instead of cutting the original filter.

I use speaker material to improve the stock screens to catch micro fine dust.
But I also use household a/c filter material to.
 
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