Plugging in case fans!

MDian

MDian

MDian

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Joined
20 Aug 2013
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112
I know this should be simple, but I'm struggling!

The rear case fan has a 3terminal plug that connects into another a 2pin plug and then has what appears to be two molex type ends. Am I suppose to plug this fan directly into the PSU, or remove that part and plug the 3terminal plug directly into the motherboard?

On the front of the case is another fan, but this doesn't use molex, it seems to connect from the fan and from a speed control switch on the back into the same plug and then leaves me with a 2pin plug which I can't connect to anything because the motherboard uses 4pins (although seems ok with the 3terminal plugs).

Any ideas?
 
You can use either for the rear case fan. The idea behind the 3-pin > Molex is so that if you have no free fan headers you can plug directly into the PSU. If you want to use a motherboard header, then feel free :)

The front fan only has two wires? Never seen that in any modern case, but I'd assume that so long as you plug into the normal 3-4 pin header (or using the molex adapter from the rear fan), and get the polarity the right way around, it'll run fine. You just won't get any speed readings in the BIOS/Windows.
 
Here is the image if you can help. This is for the front case fan which includes an LED I believe too. The left molex comes from the rear of the case where there is a low/high speed switch. The middle is the standard 3terminal plug and the right also comes from the speed switch on the back, with the plug at the back of that cable connecting to the 3terminal plug, whilst the front simply has 2pins on it. Any ideas where to connect so I can run the LED and speed?

http://i424.photobucket.com/albums/pp321/joinfreesat/IMG_0855.jpg
 
Just sure about the plug configuration so just removed the link to the speed fan for now and using the 3terminal plug. LED light works too
 
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