Dolphin is an open-source Wii, Nintendo GameCube and Triforce emulator, made for Windows, Mac OS X and Linux systems. Configuring Dolphin in a different way may allow games to run faster on a slow computer. You can configure Dolphin in a few short steps and, once configured correctly, the game may speed up. If the CPU on your computer is slow, the only thing you can do is upgrade it if the changes to the configuration do not help.
Open Dolphin and click the "Config" button at the top of the screen. Click the "Plugins" tab and select "Dolphin Direct3D9" from the drop-down list in the "Graphics" section.
Click the "Display" tab. If you want to play in 720p, change the "Windows Size" to 1280 x 720. If you want to play in 1080p, choose 1920 x 1080.
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Click the "General" tab. Check "Enable Dual Core (speedup)" and "Enable Idle Skipping (speedup)" in the Basic Settings section. Check "Enable OpenCL" in the Advanced Settings section. Select "JIT Recompiler (recommended)" in the CPU Emulator Engine section. Click "OK" to save the settings.
Click the "Graphics" button at the top of the window. Click the "Advanced" tab. Check "Enable EFB copy to Texture" and "Disable Fog" in the "Settings" section. Click "OK" to save the settings.