AMD 7730M DDR3 : 2.5xIR , no AA , 16x AF
Nvidia GT 640M : 3xIR ,no AA or 2x MSAA, 16x AF
http://www.techpowerup.com/gpudb/1200/AMD_Radeon_HD_7730M.html
http://www.geforce.com/hardware/notebook-gpus/geforce-gt-640m/specifications
Select GPU in the list below (techpowerup.com) , look at "memory bandwidth"
http://forums.dolphin-emu.org/Thread-minimum-specs-video-card
Nvidia GT 640M : 3xIR ,no AA or 2x MSAA, 16x AF
http://www.techpowerup.com/gpudb/1200/AMD_Radeon_HD_7730M.html
http://www.geforce.com/hardware/notebook-gpus/geforce-gt-640m/specifications
Select GPU in the list below (techpowerup.com) , look at "memory bandwidth"
http://forums.dolphin-emu.org/Thread-minimum-specs-video-card
Laptop: (Show Spoiler)
Mini PC :: (Show Spoiler)