"While using an analog VGA connector works if you are
just after mode-setting support, the R600/700 GPUs still lack 2D,
3D, and video acceleration using any non-Catalyst driver. Sapphire
Technology though has sent out an ATI Radeon HD 4550 512MB GPU to
see whether this sub-$50 USD graphics card plays nicely with the
xf86-video-ati or xf86-video-radeonhd drivers."