As already noted under the UD tab Igel's UD3 range has been through a number of generations. Anything described as a UD3 could be one of various bits of hardware. Here's my best guess.
|2||January 2009||UD3-X20||M300C||800MHz||Via Eden|
|3||October 2011||UD3-X30||M310C||800MHz||Via Nano|
|3||October 2011||UD3-X31||M320C||1GHz||Via Eden x 2|
|?||??????? 201?||UD3-X??||M330C||1GHz||Via Eden x 2|
|?||??????? 201?||UD3-X??||M???C||1.2GHz-1.6GHz||AMD Steppe Eagle GX-412HC (Quad-Core)|
The X mentioned under Model is 1/4/7 for Entry/Standard/Advanced.