Motherboard and case have different number of USB pins

[MustISO]

I have a lian li case and a Epox 4BDA2+ mobo. The motherboard has USB pins for front USB ports. The case came with a cable that only have 8 pins (4 for each front connector).

The cable has pins for, ground, vcc, data+ and data-. The motherboard has the same thing but two ground pins. Is it okay to just use the single ground pin?

 

[Peter]

Usually one is operational ground, the other frame ground, i.e. shielding. Connect the operational ground.

 

[ViperV990]

Use the ground pin that's right next to the VCC pin, that's the operational ground pin.

 

[MustISO]

Thank you!