As far as I know, the Mobility HD2xxx (M7x) is totally R6xx architecture with 65nm technics and fully supports like DX10 & HD Avivo etc. In fact, I take my Mobility HD2600XT as desktop HD2600 and use desktop drivers with no problem. But why it is not in the supporting list? Does SDK 1.4 really supports them? I think they got to be supported cause they do have stream processors, right? (mhd2600xt/mhd2700 has 120 stream processors, just like mhd3650).