GC is not inherently less intensive than Wii games. For example, RS2 is much more intensive than New Super Mario Bros. Wii.
You should be able to handle most things at full speed. But I suggest overclocking your CPU, or you may still have some performance issues in intensive games like RS2.
You should be able to handle most things at full speed. But I suggest overclocking your CPU, or you may still have some performance issues in intensive games like RS2.