The motherboard is in a Dell Vostro 400 and has the name DG33M03. I can see that it is from Foxxcon. It has the latest BIOS from Dell and in other forums I can read, that it should be fine.
There is a switch on the graphics card near the crossfire bridge that was set to pos. 2. Club3D Radeon R9 280 Royalking. No luck setting the switch to pos. 1.
Cannot find any dokumentation tough on what the switch does.