Wii games running much slower than GC

[scubaslim]

When I am running GC games on Dolphin, I'm running at about 60 FPS -- always easily above 30 FPS. I've tried 2 Wii games that are rated 4 stars on the compatibility chart (Dora and Diego). I can't get either to run any higher than 22 FPS. No matter how I change the settings, it is still running super slow. Before I spend my time dumping more Wii games, I'd like to know if its the games or my system or what? I feel like I have a pretty good system for this.

Operating System: Windows 7 x64
Processor/CPU: AMD FX-6300
Video Card/GPU: AMD Radeon HD 7870
Memory/RAM: 16GB
Dolphin Revision Currently Using: 4


Any input would be great. Thanks!