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Hooking up 3 pin fans to my PSU

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July 31, 2012 1:48:33 PM

This post could either go here or in cooling, but it concerns power management more than anything. I have 2 spare 3 pin 120mm fans that I want to put in as top exhaust in my new case. However, I want to hook them up directly to my PSU because they cannot be easily hooked up to my motherboard.

The issue is hooking up the 3 pins to the PSU when all I have are excess molex and sata ports from chain cables available in the case. I know there are adapters to deal with this, but I'm having issues deciding on one.

A few questions: How many 12v fans can be hooked up to one molex? Will they run at full capacity even though they are being split?

Here is an adapter I was thinking about getting: http://www.microcenter.com/single_product_results.phtml...

The issue is mostly that I do not know if those are female 3 pin ports since it does not specify and the picture is not from a good angle. Even if they were, is that a safe adapter to use or is there a better one, or even a completely different option?

Thanks for any help you can offer!

More about : hooking pin fans psu

a b ) Power supply
July 31, 2012 4:10:04 PM

They are 3-pin ports, says in the title.
4 fans, depending on which ones they are will draw atleast 600ma to 1A, delta fans will draw much more as they are high torque , high speed fans.
You could put more than i say ten but you wouldn't need that many fans.
They will run at or near max speed as they use 12v, you can get fan controllers like this- http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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a c 80 ) Power supply
July 31, 2012 4:17:23 PM

The adaptor that you linked is acceptable for what you want to do and is compltely safe to use. Those connections are female ends and will work with the ends of the fans that you have. The fans will operate at full power even though they are split and there is enough power in that molex connection to run four fans.
There ae other options and more expensive ones also. You could get a fan controller tht fits in the front 5.25 bay and that would allow you to control the speed of the fan so you wouldn't have them running at full speed.

http://www.microcenter.com/single_product_results.phtml...

http://www.microcenter.com/single_product_results.phtml...

http://www.microcenter.com/single_product_results.phtml...

These are a few options at the MicroCenter to look at. There are a lot more at other stores to looka at and you would be able to find one that fits your needs.
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