I think the OP meant which version of Dolphin is best.
You should try some of the latest development builds from here -> https://dolphin-emu.org/download/ Download only the most recent and see how that works.
Alternatively, Tino's branch of Dolphin might work well for you (Dolphin Ishiiruka, see the Development Forum).
Having said all of that, your hardware is fairly weak, so don't expect miracles. Emulating a GC/Wii is not exactly cheap in terms of hardware resources.
You should try some of the latest development builds from here -> https://dolphin-emu.org/download/ Download only the most recent and see how that works.
Alternatively, Tino's branch of Dolphin might work well for you (Dolphin Ishiiruka, see the Development Forum).
Having said all of that, your hardware is fairly weak, so don't expect miracles. Emulating a GC/Wii is not exactly cheap in terms of hardware resources.