I'm able to operate with a single CPU in either socket.
If either one of the voltage regulation module (VRM) was bad for one of the sockets, I shouldn't be able to operate one of the sockets.
Are you saying that the VRMs for both sockets are not independent?
I bought the mobo online at redplanettrading.com. They are very good and indicated they could trade it for a DT031 for me, but I hesitate to send the board back since both sockets work when I use only one CPU. It makes me think something else is up and I may be in the same situation when the new board arrives.
The Gu083 and DT031 are basically identical, I can't seem to find any mobo manuals that may help find the difference between the two.
I guess it would not coast too much to try other than time and shipping.