LoZ: Wind Waker runs slow.

[Baddy]

Hey guys,
I recently set up Dolphin on my PC.
When I tried to run Legend Of Zelda: Wind Walker, it ran around 20-25 FPS.
So I went ahead, read up about speeding up Dolphin, tried a few guides, but nothing helped.
I kept an eye on my CPU, GPU and memory usage, if something bottlenecks. Hardware doesn't seem to be the problem either.
Then I tried a couple of other games to see, if it's just Wind Waker that actually causes trouble.
Comes out:
- Every Wii game runs 60 FPS without a sweat. (I capped it at 60.)
- Every Gamecube game runs at 20-25 FPS.


Do I have to go for different settings for GC games?
I would be honestly confused, since I don't see what I COULD change that would make a difference between Wii and GC.


Quick hardware overview:
- Intel Core 2 Quad Q9400
- GTX 760
- 8GB ram


Here are two screenshots of my tests, showing you FPS, CPU, GPU and memory usage.


The Legend Of Zelda: The Wind Waker (GameCube):




Super Smash Bros. Brawl (Wii):





Config and Graphics settings in Dolphin: