Connector labelled P3 into P4 auxillary power socket? - is this ok?

[mshan]

I have this psu (http://www.silentpcreview.com/article185-page1.html ) and it has a square connector with two 12v (yellow leads) and two ground (black leads) in a square configuration that looks just like the P4 power connector of other psus I have.

However, Silverstone has labelled it P3 and there is no other connector like the P4 one I usually have with psus.

Is this my P4 connector, and is it ok to connect that to the P4 power slot on my motherboard (Intel DG31PR)?

 

[mshan]

Mine looks like this P4 connector even though there is a label P3 on it: http://www.atxpowersupplies.com/choosing-a-power-supply.htm

 

[ComputerWizKid]

P3 is probably just telling you it is connector 3 on the chain of the supply's connectors
if it looks like the ATX 12V connector then it is and should be safe to use