Pacote-san: Alright, it's fine. I get a little snippy with the comparison to PC games, as long as you understand the difference, there's no problem.
Anyway, Mario Galaxy 2 is very taxing; it really pushes the GPU thread in Dolphin hard. There's not really much you can do except Overclock your CPU, and use OpenGL prior to 4.0-1192; that'll give you the best performance. It's just much faster in this particular game on NVIDIA GPUs due to all of the enhancements to the backend degasus has given it, and this was one of the games he worked with.
Anyway, Mario Galaxy 2 is very taxing; it really pushes the GPU thread in Dolphin hard. There's not really much you can do except Overclock your CPU, and use OpenGL prior to 4.0-1192; that'll give you the best performance. It's just much faster in this particular game on NVIDIA GPUs due to all of the enhancements to the backend degasus has given it, and this was one of the games he worked with.