Not all power supplies are equal

I needed to find a power supply (12V 6A or more) with kinda yet another standard connector to power one specific Intel Atom N450 based motherboard. On the photo below there are connectors from four power supplies.



Okay, yellow one is not what I was looking for and IBM power supply with it provides 16v, which is a bit more than needed. So, the rest three have the very same connector, BUT...

(Look at the following pucture very careful till continue with reading)



...three different pin layouts! Good that motherboard has all set of protections (wrong polarity) and (one of) the power supply(ies) has a shortcircuit protection. Otherwise I would got working only one out of two: motherboard and power supply.

P.S. Be careful with this type of connector.