GCT Supertek motherboard information
This is what I have found on my harddisk, it is by no means complete. I don't know anything specific about the motherboards. This is all information I have got. If you have any additional info, send it to my email address on the main page.
ST-MGXm3HB cached Google page of the 
  manual
  p3vfa cached Google page of the manual
  GCT-8iV manual
  GCT-8iTB scanned pages