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[Solved] How do I power pcb fan splitters?

post #1 of 7
Thread Starter 


I bought two of these as I now have 22 GT AP15's to power off of my Rheobus Extreme fan controller (30W per chan max). I have 7x 3-pin female -> 2x 3pin male extensions but that only covers 14 possible fans.

I cannot for the life of me figure out how to power this. All 3-pin-molex connectors that came with the fan controller and fans are MALE 3 pin to molex, not female like I need to connect to this PCB.

Do I need to rig up my own female 3-pin to female 3-pin and connect it fan controller -> PCB splitter?

Any help is appreciated, or suggestions on how to run this many fans off of a fan controller

EDIT: Here is my ghetto paint skills illustrating the issue:



Solved. I ended up emailed Daz @ Dazmode whom I bought these from. He suggested making a 3-pin female to female as well.

I crimped my own and the results were weird. It works and it doesn't. If you plug any fan into the 3 pin parallel with the PCB it runs very undervolted. The 3pin female-female can plug in anywhere on the PCB and the fans plugged in run at 12V, except for that one pin I mentioned. So I guess it's more like a 4 way splitter, lol.

Thanks all for the help.
Edited by CanadianReaper7 - 5/18/11 at 1:15pm
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post #2 of 7
you could use a splitter. connect the male end of the splitter to a power source and then connect one of the female ends to your pcb.
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post #3 of 7
Thread Starter 
Quote:
Originally Posted by duceanahalf View Post
you could use a splitter. connect the male end of the splitter to a power source and then connect one of the female ends to your pcb.
The issue is all power sources have 3 pin MALE connectors (intended to plug into a female fan), not female like I need
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post #4 of 7
post #5 of 7
Thread Starter 
Quote:
Originally Posted by SmasherBasher View Post
That actually looks to be very close to what I need to just power the PCB, but I was wanting to power it off of the fan controller so I can adjust the speed of the fans.

Should I just make my own 3-pin female-female and try it?
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post #6 of 7
I'm confused for if this is actually solved based on your comments about weird voltages.

That said, I'm in the same boat, using 8 fans on a 4 fan controller. I purchased 2 of the 3 pin, 4-way adapters (3 fans, 1 power) from FrozenCPU and ran into the same issue of male/female connectors. I have some female ends in the mail and will get them wired up hopefully tomorrow. Based on your findings, are you now using female to female cables successfully or still having weird voltage issues?
 
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post #7 of 7
interesting. i am looking for a similar solution for 18 GT15's (3x6 configurations) and a pwm controlled pump, all in an external enclosure.

Was going to use a Lamptron FC5.

Not many fan controllers that do PWM and 3 pin @ > 18w per channel.
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