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M.B Fan voltage question.

post #1 of 5
Thread Starter 
Hi there all,
I'm in the process making my own open air case so to speck... im done with the case.
Anyway on my MB im not short of fan connections but don't want wires running all over my board so question is that if i pair the 4 x 120mm fan i have and need/want into 2 pairs and run each pair from one Mother board fan connection will it half each fans power...
Not sure how this works from a Mother board so be interested hearing about this so any direction be a great help.

Thanks for looking in on this one all

EDIT.. in pairs of two Sharkoon silent eagle 2000rpm fans
Edited by Jay.C - 3/11/11 at 4:02am
    
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post #2 of 5
You should be able to run at least ~0.5A of Amperage through your motherboard header, check your motherboard manual for exact numbers. If the total Current draw of the fans connected to one fan header does not exceed this maximum Amperage, you should have no problem running multiple fans off one header
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post #3 of 5
Thread Starter 
I'll have a look at that but still a bit unsure about your reply

So what your saying is you think
there should be enough power coming through the MB fan header to support two fans...Sharkoon silent eagle 2000 x 2 on each pair..

Sorry if coming across a bit dumb but just learning this fine art in PC building
    
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post #4 of 5
The MB manual is a bit cryptic about what the fan headers actually support:
Quote:
The fan connectors support cooling fans of 350 mA-2000 mA (24 W max.) or a total of 1 A-7 A (74 W max.) at +12V.
Apparently you can run up to 24W from each header, and up to 84W from all headers combined. The Sharkoon silent eagle 2000 is rated at 2.16W, so theoretically you should be able to run up to 11 fans from each MB fan header.

An indicator of whether you overload your MB fan header is to watch your fans' RPM. If it drops significantly when connecting an additional fan, then you have exceeded the maximum power output of the fan header. Remember to connect only one fan's RPM sensor wire (often the yellow one) to the fan header, or it will mess up the RPM reading.
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post #5 of 5
Thread Starter 
Quote:
Originally Posted by phal View Post
The MB manual is a bit cryptic about what the fan headers actually support:

Apparently you can run up to 24W from each header, and up to 84W from all headers combined. The Sharkoon silent eagle 2000 is rated at 2.16W, so theoretically you should be able to run up to 11 fans from each MB fan header.

An indicator of whether you overload your MB fan header is to watch your fans' RPM. If it drops significantly when connecting an additional fan, then you have exceeded the maximum power output of the fan header. Remember to connect only one fan's RPM sensor wire (often the yellow one) to the fan header, or it will mess up the RPM reading.
Hay thanks for putting it in an easy format to understand for a newbee like myself..
You've gone out your way to find these results so a big thank you is in order im thinking
    
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