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-   -   Molex Alternative? (http://www.hardwarecanucks.com/forum/peripherals/21769-molex-alternative.html)

Xillion August 10, 2009 12:19 PM

Molex Alternative?
 
I have 7 case fans in my chassis and those Molex to 3 Pin adapters are starting to pile up and are really messy. Would there be any available options? Such as a PSU with a bunch of 3 Pin connectors? or Fans with a stright up Molex or Sata connection even? or am I just nuts?

Supergrover August 10, 2009 01:06 PM

NCIX.com - Buy Bitspower X-STATION POWER-EXTENSION I - Male Version 4PIN Molex to Power Distribution Board - Green - BP10500 In Canada.

MpG August 10, 2009 04:31 PM

My homemade fan splitter - one cable in, nine out :biggrin:
http://www.hardwarecanucks.com/forum...0ad6011067.jpghttp://www.hardwarecanucks.com/forum...0ad60140c1.jpg
http://www.hardwarecanucks.com/forum...0ad6011067.jpg
http://www.hardwarecanucks.com/forum...0ad60140c1.jpg

SugarJ August 10, 2009 05:03 PM

I've got one of these in red. 11 fan headers, but 4 are 12v, 4 are 7v, and 3 are 5v. Good for undervolting those 3000 rpm fans, not so good if you plug your pump into a 5v like I did on the weekend.

Xillion August 10, 2009 07:12 PM

Quote:

Originally Posted by MpG (Post 238267)
My homemade fan splitter - one cable in, nine out :biggrin:

What kind of voltage distribution do you get on that?

MpG August 10, 2009 08:12 PM

Quote:

Originally Posted by Xillion (Post 238344)
What kind of voltage distribution do you get on that?

Parallel distribution - every output voltage is identical to the input voltage. Obviously, I have to pay attention to the total current draw, but the PCB itself is fine up to around 3-4 amps, and probably just as high as 5-6 amps total. And I'm getting power right off the PSU, so there's no danger of overloading a motherboard header. The rpm sensing is also useless - I only soldered those on to make the pin headers more solid.

bojangles August 11, 2009 05:15 AM

Quote:

Originally Posted by MpG (Post 238381)
Parallel distribution - every output voltage is identical to the input voltage. Obviously, I have to pay attention to the total current draw, but the PCB itself is fine up to around 3-4 amps, and probably just as high as 5-6 amps total. And I'm getting power right off the PSU, so there's no danger of overloading a motherboard header. The rpm sensing is also useless - I only soldered those on to make the pin headers more solid.

Agreed, but don't all those signals get bunged up? I guess not if that's what you say...:haha:. That is a great PCB you have there and now I'm thinking of getting one.

MpG August 11, 2009 05:46 AM

Quote:

Originally Posted by bojangles (Post 238472)
Agreed, but don't all those signals get bunged up? I guess not if that's what you say...:haha:. That is a great PCB you have there and now I'm thinking of getting one.

There shouldn't be any problem - at least I'm pretty sure. To the best of my understanding, fan rpm signals are just Hall-effect pulses, so they shouldn't strong enough to affect each other.

Or did you mean "bunched up"? Because there's no (reasonable) way to sync the pulses up between fans, so any sensor on that line would be getting a whole shower of pulses at weird intervals. Nine fans at 1000rpm might give out a reading of 1000rpm, or they might give a reading of 9000rpm. :biggrin: And you'll never see 0rpm unless all nine fail, so it's not even any good for a fan failure check.


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