(03-01-2012, 01:30 PM)SauloOnofre Wrote: No matter if I put in the lower ou the highest resolution it doesn't affect the FPS.
Then that means your graphics card isn't the bottleneck, when it comes to internal resolution. If you don't get drops in FPS, then your GPU is good enough for those internal resolutions. For Dolphin, your GPU determines the maximum internal resolution (without taking a performance hit), anti-aliasing, and anisotropic filtering (most cards are more than capable of 16x though). The rest of Dolphin's performance usually lies with your CPU.
(03-01-2012, 01:30 PM)SauloOnofre Wrote: The only thing that changes the performance is A.A,if I put in 9x it makes the game unplayable.
Yeah, your GPU is capable of high internal resolutions, but it looks like high AA settings are too much for it. A lower internal resolution with that AA setting might be possible and preferable in your case, since you could at least play the game.
You might need to OC your CPU to get any noticeable increase in Dolphin's performance. Although you never said what FPS you were getting, have a look the Dolphin Wik entry for Donkey Kong Country Returns for an estimate of the kind of power needed to get full-speed.