Confused about FAN attachment to the power grid

[edijs]

I want to buy this little treat for my somewhat closed up case:

I have 2 case fans already and my motherboard has no additional free 3-pin FAN connectors;

I see that this FAN has a Molex connector, though. Is that enough or does it need both the 3-pin connector and the Molex?

I'm kinda confused here...

 

[RHochstenbach]

You can use either the small plug or the molex connector. As you can see, only the 3v wire leads to the molex connector ;)