Check if an external hard disk case support SATA III or only II ?

Assume I have a hard disk which supports SATA III (=verified).

I want to put this hard disk into an external hard disk case and connect it by USB v3.0 to my computer.
Later I want to use case and hard disk as backup storage.

Now I doubt that the case supports really SATA III. My guess is that it supports only SATA II.

Ok, I assume the hard disk itself is working with SATA II too.
But I want to use the full speed und feature set of SATA III.

So how can I check the supported SATA versions of the case from Win 7?

Peter

Hello,
You can use which SATA port you need...see here