Here are the names of the power chords with the 
root note on the 6th string.


  E5  F5  F#5 G5  G#5 A5  Bb5 B5  c5   c#5  D5   Eb5  E5    
E|---|---|---|---|---|---|---|---|----|----|----|----|----|
B|---|---|---|---|---|---|---|---|----|----|----|----|----|
G|---|---|---|---|---|---|---|---|----|----|----|----|----|
D|-2-|-3-|-4-|-5-|-6-|-7-|-8-|-9-|-10-|-11-|-12-|-13-|-14-|
A|-2-|-3-|-4-|-5-|-6-|-7-|-8-|-9-|-10-|-11-|-12-|-13-|-14-|
E|-0-|-1-|-2-|-3-|-4-|-5-|-6-|-7-|-8--|-9--|-10-|-11-|-12-|