What you are seeing above is an AMD RS780 next-gen chipset that has a DX10 R600 derivative “GPU” integrated. There is also a piece of discrete RAM on the motherboard that can be offered in either 16MB or 32MB capacities that acts as part of the framebuffer and is within close proximity to the IGP to remedy latency issues. Beyond that the RS780 chipset uses system RAM to house the rest of its total 256MB of framebuffer space available.
The external discrete video card plugged into the primary PCI-Express slot is a next-gen RV620 GPU. It is a 55nm DX10.1 PCIe Gen. 2 part with 256MB of local GDDR3 memory. This video card was referred to repeatedly as a US $49 video card. Therefore it is obviously a low-end part and so we did not expect much gaming performance from it at all.