What (if any) of my hardware would be causing slowdown in Super Mario Galaxy?

[KaptainKornhole]

Okay, so I think I figured it out (sort of). I added Dolphin to the Nvidia Control Panel > Change 3D Settings. I changed Power management mode to "Prefer Maximum Performance". Now I can get 3x IR, no AA, and 16 AF with no slowdown including jumping into ice water. However, I really think having AA on makes the game look better. So with the change to Nvidia control panel I can set it to 2x IR, 4x AA, and 16x AF but I still get slowdown in the ice water. However I don't get slow down when the mother closes the storybook in the library. AA is twice as high as it was before. When I set it to 4x AA previously I got slowdown all over the place. So, I need to decide which I want. It seems having AA on in any capacity causes slowdown in ice water. Is this normal no matter what GPU you're using?