The following content is related to the August 2012 issue of Guitar World. For the full range of interviews, features, tabs and more, pick up the new issue on newsstands now, or in our online store.
Most power chord forms in rock and metal and comprised of either two or three notes, usually with the root note placed as the lowest note in the chord, joined with a note a fifth higher to create the two-note form, or with an additional root note on top to create a three-note-form.