Getting 30fps but games still seem slow

[veggiesoup]

I'm trying to play super smash bros melee or brawl but in other games two like Mario kart double dash and others.
I get about 20-30 fps but even if I'm getting 30 fps the games still seem to be moving in slow motion.

Is there any way I can increase performance of dolphin?

Here is my system:
AMD Phenom II Triple-Core (2.1GHz)
ATI Mobility Radeon HD 5470 1G DDR3 VRAM Dedicated Card
4GB Ram

Edit: Im using the Direct3D9

[-DarkAceZ-]

Is Dual Core mode on? What graphics plugin are you using?

[boogerlad]

cause full speed is 60fps?
In those games anyways.