USB header question
 

i've finally been converting over to various computer accessories that make use of usb ports, and i've decided to mod my pc to include 2 front usb ports, which i figured should be fairly easy since my motherboard has a header for usb ports 3 & 4 on it. my problem is this, i was under the impression that a usb port went something like +5V, ground, ground, data, (which could easily be wrong, i'm not sure) and the header has 15 pins on it.:mad:
they're labeled as follows,
1. VCC
2. UP2-
3. UP2+
4. Ground
5. Key
6. VCC
7. UP3-
8. UP3+
9. Ground
10. Ground
11. Ground
12. Ground
13. UP2+
14. UP2-
15. VCC

My first thought was something like "WTF???" maybe its set up so it can accept a couple different type plugs or something? any help deciphering this would be greatly appreciated. Thanks!

bump, any you electronics guys wanna help me figure out the header on this one?

looks like there are 3 separate USB headers to me

Alot of those grounds are extras. I think the VCC is power. There is a + and - signal header for each port. as well. So for each port you should have something like this:

VCC x
Ground
UPx-
UPx+

you might want to look here , its the manual for the Antec Sonata that llists how the front usb ports are hooked up. It might clarify some things for you.

Actually the layout of a USB port is: Vcc (red) Data- (white) Data+ (green) GND (black). On five-pin headers the fifth is also GND, (also black). This often connects to the shield of the cable or port.

So you got connections for three USB ports on there, all mixed up a bit. no matter. Just make sure each port has a Vcc, matched pair of data- and data+, and a GND.