Watch the Modern Power Chords online guitar lesson by TrueFire from Play Rock Guitar 8: Advanced Rhythm Approaches
Modern Power Chords - Overview is a video guitar lesson presented by Carl Verheyen and is sourced from S.W.A.T. Rhythm.
Power chords can be defined many ways. In this overview I list a few of the ways people have come to understand what the term means. You'll find there are quite a few varieties.