Bad Performance with Dolphin 4.0.2 and Mario Kart

[hsdneo]

Thanks for your answer.

I have tried some things including your guide, but mario kart is still running low. If i your 4xIR and 16xAF everything looks very nice but the speed isnt improved. I used open gl with about 50-60 frames most of time but music stutters and sometimes i have only about 40 frames.
If i use direct3d9 the frames go down to about 10 some time.

So what are the best settings in dolphin for graphic, CPU and audio emulation? And are there some tweaks if i change the settings from the specific game by right click on it?

thanks