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Push/pull plugging into mobo?

Last response: in Overclocking
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July 30, 2012 2:52:48 AM

Hey guys,

So I've bought two cooler master 120mm fans to go in a push pull set up on my hyper 212+. The problem is, they have 3 pin connectors, and the CPU fan header on my mobo (gigabyte GA-Z77X-UD3H) is a 4 pin. I know I can buy a splitter to plug both fans into the one fan header, but if I use a 3 pin to 4 pin adapter in addition, will everything work properly?

I suppose the short question is, will the mobo still be able to control the speed of the CPU heatsink fans even if I use the 3 pin to 4 pin adapter? Isn't one of the "pins" for speed control?

Also, if everything will still work as it should, is it better to use a 3 pin splitter plugged into the fans directly and then plug that into a 3 pin to 4 pin adapter or is it better to plug each fan into a separate 3 pin to 4 pin adapter and then plug those into a 4 pin splitter? Or does it not matter? One is slightly cheaper, obviously.

Thanks!
a b K Overclocking
July 30, 2012 3:06:23 AM

I have a Gigabyte 990fx....UD3 board and it auto detects 3 or 4 pin connections, so I just used a standard splitter that plugs into the board with three pins. (3 pin connections with one connection that only has two IIRC)

I would expect it to do the same with your board.


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July 30, 2012 3:13:36 AM

Z1NONLY said:
I have a Gigabyte 990fx....UD3 board and it auto detects 3 or 4 pin connections, so I just used a standard splitter that plugs into the board with three pins. (3 pin connections with one connection that only has two IIRC)

I would expect it to do the same with your board.



So you just use a 3 pin fan splitter (like this one: http://www.newegg.com/Product/Product.aspx?Item=N82E168...)?

How do you plug it in to the mobo's 4 pin CPU fan header?
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a b K Overclocking
July 30, 2012 3:19:19 AM

It looks like this one, but the one in this link has 3 wires to each fan and mine only has two wires for one fan.
http://www.tigerdirect.com/applications/SearchTools/ite...

When I plug into the MB, I just line up the "slot", and leave one lonely pin sticking out of the MB connection point. (The 3-pin connector leaves it plenty of room)
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July 30, 2012 3:26:12 AM

And your mobo can still control the fan speeds? Are you sure it doesn't just turn the fan on and off?
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a b K Overclocking
July 30, 2012 3:43:09 AM

Yes, I'm sure.

During prime 95 the fans get louder and when I shut down prime 95 the get quiet almost instantly. My case fans are all 3-pin fans too and the ones that are plugged into the "system fan" headers vary speed as well.

The fan that's plugged into the header labeled "power fan" is probably always at the same speed. (It's also just a three pin fan)



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a b K Overclocking
July 30, 2012 3:58:01 AM

the mobo will be able to control the fans fine, there should be an option in the bios somewhere for the cpu fan power you might want to check, most of the time its set to auto but u can select from auto/voltage/pwm.
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a b K Overclocking
July 30, 2012 11:03:18 AM

ForYourHealth said:
All right, thanks a ton!

I found a cheap one on amazon, if you ever need another

http://www.amazon.com/Syba-SY-CAB65007-Female-Connector...


Just a heads up, that one doesn't look like it will plug into your 4 pin connectors.

You want one that's "open" where the three pins plug into your fans. (Because your 4-pin fan connectors are to big for the "enclosed" 3 -pin connector)
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July 30, 2012 12:46:05 PM

Okay guys, thanks for all your help!
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July 30, 2012 12:46:45 PM

Best answer selected by ForYourHealth.
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