Did you contact the place of purchase?
Okay seems like I have gotten things mixed up here, apparently according to many sellers in China a QS would display its name in CPU-Z whereas an actual Engineering Sample would show none.
I am not sure if this is true or not I cannot exactly relay on this guy I wonder if you people at Intel know anything about this, I know ES and QS are not supposed to be sold in the first place but I really have no idea about these kind of things.
By looking the Qspec code QCH8 you have an Engineering Sample or a Qualification Sample. For better understanding please check the link below
If you have additional questions or concerns, please contact Intel Corporate Security Investigations. the contact information is in the same link.