Questions about my new laptop

[Korados]

I set Dolphin to maximum power on the NVidia Control Panel. This must have worked wonders because most of
the games are perfect now! Even Super Mario Galaxy works at full speed! Thank you for this!
However, when I set the internal resolution to a number, the rendering looks quite bad. I like the Auto setting better.

But, strangely, Super Smash Bros. Brawl is still stuttering and the audio crackling is there, albeit only on the new revisions.
On 3.5, Brawl is fine. Maybe there's something in the new revisions what interefers with Brawl?