EATX12V Connector Confusion

The P5B Deluxe comes with an 8-pin EATX12v connector, but four of the plugs are capped.

My PSU (Neo-HE 550w) has an 8-pin connector that can either be plugged into an 8-pin connector or split in two on a dual-cpu board, like a server.

It ALSO has a separate 4-pin EATX12v connector!

I RTFM, searched here and the ASUSTEK forums but am as yet unsure of which config to use.

Thoughts?

Moe

Just pop off the cap and plug in the 8 pin connector. You can also use the standard 4 pin connector. But I'm not sure how true this is but I've been told that the 8 pin connectors are more stable for power.