|Windows Device Manager cannot display the make & model of a device if there's no driver installed for it. There is no "universal driver" except the one that Windows uses by default when the proper one isn't installed, but that's just a basic driver which allows only a low resolution and cannot 'tap in' to the advanced features of the card. It just allows Windows to run so you can download and install the proper driver.|
In most cases, all the correct drivers for factory-fitted components are supplied by the PC manufacturer, which in your case is Shuttle.
Failing this, the next place to go is the manufacturer of the actual device, which you do not know.
You have two options:
1. Physically open the shuttle case and have a look at the label on the graphics card.
2. Download, install and run some software which can identify devices which are listed as "Unknown Device" in Device Manager.
This may get you out of the catch 22 situation you are currently in: http://www.zhangduo.com/udi.html