RV870 single-core, R870 dual-core, R800 quad-core?

[Shintai]

although I have no idea what to expect from RV870 to be honest.

I would expect something like 256 or higher MC depending on GDDR5 speeds. 800-1200shaders. (Maybe 960-1200 after RV790). Else just improved tweaked parts inside for new SM, overall DX11 and OpenCL support. Perhaps higher clocks too.

Then the usual type of cards as we have today. Possibly tho with no PLX chip. But that require AMD solve the issue did long ago with 2 GPUs directly on a PCIe bus. Sideport could also be there if they didnt abandon that idea again.