Corsair Air 240 Built in fans help

[Alanek2002]

I'm looking to get the Corsair Air 240 case, but my motherboard only has 1x 3 and 1x 4 pin fan connectors. I'll be getting some fan splitters, but I need to know what pins the inside fans are, to avoid wasting money. Despite my googling, all i know is that the fans are made by corsair, and are 120 mm. >.<

Watts used would also be awesome!

It seems like such a simple thing to find online... >.>

On the note of splitters/fans: what is PWM, and do these fans have it?

Thank you so much for your help!

Build is here if needed. http://pcpartpicker.com/user/Alanek2002/saved/9LCqqs

 

[DonkeyOatie]

PWM is Pulse Width Modulation and is a way of controlling fan-speed without changing voltage, by sending pulses of power. PWM is usually for the CPU fan and uses a four pin header.

My case uses a pair of Corsair SP120 Quiets with three pin plugs through a two way splitter to a three pin header and works for me. These control speed by changing voltage, not pulse timimg/width.