Tony Hawk Pro Skater 4 is extremely demanding, your processor simply can't cut it. I know, because I'm on a Core i5 3570K and could barely eek out 60 fps most of the time, and even then some stages had my framerate dropping quite a bit. You can destroy the shadows by switching to EFB2Texture after booting the game, lower the internal resolution as much as you can, and mess with various other settings, but this game is just difficult to run.
And no, your computer does not have enough power to deal with a "simple" GameCube game. This is because emulating a GameCube is not a simple task. I could explain more, but, I'm fairly sure the FAQ goes into more detail on why emulating games takes substantially more CPU than the actual console itself.
And no, your computer does not have enough power to deal with a "simple" GameCube game. This is because emulating a GameCube is not a simple task. I could explain more, but, I'm fairly sure the FAQ goes into more detail on why emulating games takes substantially more CPU than the actual console itself.