How do I setup these fans?

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bazpaul

bazpaul

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Oct 24, 2013
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Hi guys,

I have four fans and a 5 way splitter .

Ive got four fans and a Bitfenic Prodigy case;

1 Bitfenix spectre 230mm pro (intake at front)
3 Bitfenix spectre 140mm (exhaust at back/top)

The splitter can only read the speed of one fan and this is my issue.

Should I;

Option A - read the speed of the big 230mm and run the 140mm based on the voltage supplied to the 230mm

Oprion B - read the speed of one the 140mm fans, thus the large 230mm would be supplied the voltage of the smaller.


My opinion is that option A would run the smaller fans at a very low RPM at low temps because of the large CFM of the 230mm

Option B would run the 230mm at a high speed during intensive gaming and possibly shorten the life of the fan much quicker!

-------------------


Would love your thoughts on which setup would be best and why you think so!

Or will it even make a difference!
 
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bazpaul

bazpaul

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Oct 24, 2013
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Thanks mate - To be honest, I dont really want to run the 230mm at full pelt. Wouldn't this significantly reduce the lifetime of the fan?

I was thinking of reading the speed of the 140mm fan, then running loads of tests - I could create custom speed fan profile to control speeds

 
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coozie7

coozie7

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Jun 2, 2007
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Personally, I think you're pushing your luck running so many fans off one header so I'd get a multi fan controller unit, in the meantime, run just the front and a single rear fan off the one header, before you burn out the motherboard tracer, and, possibly toast the board itself.
 
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bazpaul

bazpaul

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Oct 24, 2013
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Thanks for input - but isnt all the power taken from the molex on this cable? Only PWN and speed control are sent to mobo. I'm pretty sure thats how this cable works
 
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Eduello

Eduello

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Mar 2, 2014
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Yes, that's how it works. You could try running loads of test and using a custom fan profile, maybe that'll work as well.
 
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coozie7

coozie7

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Jun 2, 2007
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Oops, misread your post, me bad, yes, you're fine running with a molex powered splitter.
I'd go for option 1, it's more important to have good intake than exhaust, at least in my experience, only possible concern is that the 140 m.m. fans may not start at low voltages so as Eduello says, you'll need to run tests.
That said, I still think you'll be better off using a multi fan controller so you'll have a 'one stop' solution and total control.
 
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