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GamerOC

439 posts

Ultimate Geek


#62623 10-Jun-2010 21:28
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Hi there, I would like to request if anyone know what is best for cooling a system with air
should i have positive air pressure
or should i have negative
what runs cooler positive or negative,


cheers,


Andy

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Wilstar
71 posts

Master Geek


  #340466 10-Jun-2010 23:04
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In theory negative will run cooler because there is a higher throughput of air, problem is with negative pressure dust gets sucked in not just through grills but any other opening, because air is always trying to get to the area of 'negative' pressure.
I've always gone for more intake over outtake by one 120mm fan.

I'm sure there will be differing opinions on here. Why don't you try and see what works best for your case/application?

littleninjaman
103 posts

Master Geek


  #340827 11-Jun-2010 23:04
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I think positive air pressure is better sense when you have a negative you have less air in in the case making it harder for the fans inside the case to push air through your heatsinks. Well thats my theory any way lol

 
 
 
 


GamerOC

439 posts

Ultimate Geek


  #340834 11-Jun-2010 23:22
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So negative pressure should be cooler but dust sucking in issue could be a problem as dust get stuck in heatsinks then affect cooling..

So possitive may not be as cool as negative but i feel more incline for less dust inside the case and components...

would it be possible if you have same speed fans to have same number of fans pushing air in as well as pushing air out.

I think i will try possitive pressure first and check temps,


thank you guys,


Andy

Fraktul
836 posts

Ultimate Geek

Trusted

  #340839 11-Jun-2010 23:58
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There are advantages and disadvantages to both, however each case has its own air flow so your results will vary.

Ensuring good cable management and that cool air has a clear directed flow over components in need of cooling and then out of the case is most important.

Wilstar
71 posts

Master Geek


  #340841 11-Jun-2010 23:59
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littleninjaman:

I think positive air pressure is better sense when you have a negative you have less air in in the case making it harder for the fans inside the case to push air through your heatsinks. Well thats my theory any way lol

Sorry mate we're not creating a vaccum with a few 12V fans, maybe we should find another term for negative pressure, what about 'more out than in'

To the OP, you're unlikely to get perfect airflow, because of the turbulance caused by components, good luck.

littleninjaman
103 posts

Master Geek


  #340861 12-Jun-2010 01:56
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True I guess I'm thinking on a much large scale like industual. I don't think small scale lol

GamerOC

439 posts

Ultimate Geek


  #340889 12-Jun-2010 09:25
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Hi there, thank you all for you information is very usefull.

I'm going to a final exam at uni so I will upload some pictures tonight for you guys to see
the case and the setup plan and will appretiate some feedback,

thanks,


Andy

 
 
 
 


GamerOC

439 posts

Ultimate Geek


  #341355 14-Jun-2010 00:13
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due to the size limit set by Geekzone i went and upload them at this link through Youtube feel free to have a look and let me known what you reckon, the video is not too flash as i'm just learning to use this video edition software i got,

the link is: http://www.youtube.com/watch?v=cZVmmQSQYLc



cheers,

Andy

Wilstar
71 posts

Master Geek


  #341411 14-Jun-2010 09:50
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Nice vid mate!
What fans are you going to have in the front? I'd probably do the 7 volt trick on your blow hole fan in the top as well, you don't want that fan sucking fresh air away from the CPU, just getting rid of stagnant warm air that has collected in the top of the case.
I take it the finshed product will be on a desk?  Those two 120mm at the bottom will need cleaning regularly wherever you put it but especially if its sitting on carpet.  When your doing temperature trials, please do one without the blower fan in the top, disconnect and put a bit of cardboard over the hole - just for interest.
Paint work on top panel is sexy, beautiful gloss.

GamerOC

439 posts

Ultimate Geek


  #341599 14-Jun-2010 17:09
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Thank you for you comments and ideas Wilstar and yes i have a plan to check temps before cutting hole on the top of the case. the paint on the outside panels look like the top panel glossy black it has three coats on top of the primer. will add clear coat at the end for protection. will add filters for the fans and will raise case with castor wheels.


I am painting the computer case

And metallic blue for the inside of the chasis

Also i have added two 120mm Silenx  fans on the bottom of the case

And i will be adding a 120mm Silenx fan to the top of the case as well

And possibly a 120mm Silenx fan on the window of the case

I cut a huge window so i can see my uv light making

All the cables and fans glow and illuminate the case

And i’m still considering replacing the front of the case with

Plexiglass with two 120mm turbine aerocool silent fans

And also modded buttons for the power on and reset buttons

Thank you for watching and please leave a comment  or if you have any ideas in how i can improve my project please let me know.

cheers,

Andy 


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