ASRock USB header question

[mojothehut]

Hey all
So this is kind of a weird issue.
I bought an Antec Sonata Proto and an AsRock H77 Pro4-M for a budget desktop.
I'm installing everything and notice the front USB 3.0 header cable on my Antec case is a 20 pin connector. My motherboard's header is 19 pin D:

Would it be dangerous to plug a 20pin into a 19 pin? I've never come across an issue like this. All I did while searching for a cheap case was see "front usb 3.0" and was happy.

I would really like having front usb 3.0 use, as I use several 3.0 external HDs and regularly backup large files

 

[WilliamM2]

Looks like a standard usb3 header on the Asrock, and its keyed. Should be fine.

 

[mojothehut]

Yea I think 19pin is the standard?
I just found it weird that the cable in my case is 20pin.
As long as I don't fry anything when I hook it up and use it