Molex power connector question

I will be installing a PCI Express x1 card.  I have to connect a 4-pin molex power connector to the card.  I see 4-pin power connectors labeled P4, P6, etc.  Can I use any of them?
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The card power header will dictate the type of plug you will use. I am linking connectors here because your confused. Although the molex, floppy, and ATX all have 4 pins, all are different designs. The ATX also has a different electrical output.
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