Which 24-pin connector port should i use?

[Morkintash]

My motherboard has two connector ports beside each other. One is white and the other is black. Both can hold house a 24-pin connector, (but i believe the white connector just grounds the extra 4 pins)
Which connector should I use and what are the benefits of each one?
From googling around Ive learned the white connector is used with most older systems but the black port i can't find nothing on.

 

[davcon]

What mobo is it?
Be specific.

 

[Morkintash]

What mobo is it?
Be specific.

IPIBL-LB (Benicia)
Figure 1: Motherboard top view

Manufacturer: Asus
Form factor: microATX - 24.4 cm (9.6 inches) x 24.4 cm (9.6 inches)
Northbridge chipset: Intel G33 Express
Southbridge chipset: Intel ICH9R
Memory sockets: 4 x DDR2
Front side bus speeds: 1333/1066/800 MHz
Processor socket: 775
Expansion Slots:
1 PCI x16 slot for graphics card
2 PCI x1 slots
1 PCI slot

 

[davcon]

The white one is the ATX header for your psu 20+4/24pin.
The 4pin 12v atx connector from your psu goes at the top left near your cpu socket.
They both need to be connected in order for your mobo to post.
The black one beside the ATX is a floppy header.
It will all be stamped on the board.

 

[Morkintash]

The white one is the ATX header for your psu 24pin.
The 4pin 12v atx connector from your psu goes at the top left near your cpu socket.
They both need to be connected in order for your mobo to post.
The black one beside the ATX is a floppy header.
It will all be stamped on the board.

Ok, Thank-you!

 

[Morkintash]

Best answer selected by Morkintash.