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10-20-2009, 11:06 AM
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#1
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Xtreme Member
Join Date: Jul 2009
Location: Lansing,MI
Posts: 191
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Push and pull fan speed?
Does the push fan and the pull fan need to be the same speed? I am trying to use the typhon on the bottom and some led ones on the top to have the light but they are not gonna be same rpm would that be fine?
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10-20-2009, 11:08 AM
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#2
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Xtreme Member
Join Date: Oct 2008
Location: Florida..Tampa and St Petersburg
Posts: 432
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dont understand the question...what r u doing with the fans?
__________________
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10-20-2009, 11:13 AM
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#3
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Xtreme Member
Join Date: Nov 2008
Location: Sweden
Posts: 150
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As long as the fans are about the same you will be fine.
I would not try 3000 rpm Delta on one sida and 500 rpm on the other side.
Think there is some old thread with some actual tests. Try the search function 
__________________
"I don't have a masters degree, but even I know that mixing water and electronics is a stupid thing to do."
My girlfriend.
"It's easy to get sideways at first thinking there is ONE BEST product for each area of water cooling. But, that's not always the case - depends on your exact setup and needs."
shazza
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10-20-2009, 11:15 AM
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#4
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Xtreme Member
Join Date: Jul 2009
Location: Lansing,MI
Posts: 191
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Quote:
Originally Posted by VOID WARRANTY
dont understand the question...what r u doing with the fans?
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I mean for those fans on the rad. One set of them on the bottom of the rad and one set of them on the top of the rad. Do those fans on the top an bottom need to be same speed?
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10-20-2009, 11:17 AM
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#5
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Xtreme Member
Join Date: Oct 2008
Location: Florida..Tampa and St Petersburg
Posts: 432
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Quote:
Originally Posted by Kanzy
I mean for those fans on the rad. One set of them on the bottom of the rad and one set of them on the top of the rad. Do those fans on the top an bottom need to be same speed?
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what!! yea it should be fine
__________________
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10-20-2009, 11:49 AM
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#6
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Xtreme Member
Join Date: Jan 2009
Posts: 260
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They need to be relatively close to the same fan speed, otherwise you can damage the slower one (the airflow will force it to spin faster, which will damage the motor). But if they are within a 100 or so RPM it should be fine.
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10-20-2009, 12:05 PM
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#7
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Xtreme Member
Join Date: Jul 2009
Location: Lansing,MI
Posts: 191
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Quote:
Originally Posted by Baulten
They need to be relatively close to the same fan speed, otherwise you can damage the slower one (the airflow will force it to spin faster, which will damage the motor). But if they are within a 100 or so RPM it should be fine.
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what if I put the slower one before the fast one? Will that solve the issue?
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10-20-2009, 06:25 PM
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#8
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Xtreme Member
Join Date: Jun 2008
Location: Tokyo, Japan
Posts: 275
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Quote:
Originally Posted by Kanzy
what if I put the slower one before the fast one? Will that solve the issue?
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Maybe someone over here can help you or you can find a good answer there.
http://www.silentpcreview.com/
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10-20-2009, 06:38 PM
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#9
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Registered User
Join Date: Sep 2009
Location: Ontario, Canada
Posts: 24
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The whole idea behind push pull is to minimize the air flow resistance.
So if one side is slower then the other side, the slow side would actually create resistance. I could be wrong, just my 2c
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Case intake: 22, Case output: 24.
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10-20-2009, 08:54 PM
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#10
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Xtreme Guru
Join Date: May 2009
Location: Southfield, MI
Posts: 3,523
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No matter what, the fans need to be matched. The faster one will overpower the slower one.
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10-20-2009, 11:53 PM
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#11
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Xtreme Member
Join Date: Nov 2008
Location: Sweden
Posts: 150
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Meh, now i got curious and had to go dig up the old thread I was thinking about.
http://www.xtremesystems.org/forums/...d.php?t=189402 Vapor did some actual tests in the end.
http://www.xtremesystems.org/forums/...&highlight=fan and a little more.
My interpretation of the mechanics involved is that as you can compress air, water is for all practical purposes incompressible, you get kind of an air dampener in between the fans so you don't need to match the power of the fans as closely as with pumps. Add to that a much flatter pump (flow/pressure) curve and you got a much more tolerant system. You need some serious unbalance in power to damage or lose all the effect from the weaker fan.
Yea I know just rambling. If anyone actually have an idea on how it works feel free to inform me 
__________________
"I don't have a masters degree, but even I know that mixing water and electronics is a stupid thing to do."
My girlfriend.
"It's easy to get sideways at first thinking there is ONE BEST product for each area of water cooling. But, that's not always the case - depends on your exact setup and needs."
shazza
Last edited by Jah; 10-20-2009 at 11:58 PM.
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