The megahertz myth is the idea that a computer with a higher number of megahertz is faster and better than one with a lower number. Megahertz is a measure of how fast a computer can do calculations, but it isn't the only factor. Different types of computers can have different speed and do different tasks better or worse, even if their megahertz are the same. So two computers with the same megahertz can actually have different speeds depending on what you want to use them for. Think of it like a race between two runners. One runner might be faster if it's a long distance race, and the other runner might be faster if it's a sprint. Both runner's speeds are important, but they won't be the same in all races!