Here are the names of the power chords with the 
root note on the 5th string up to the 12th string.
After that the names repeat themselves.


  A5  Bb5 B5  C5  C#5 D5  Eb5 E5  F5   F#5  G5   G#5  A5  
E|---|---|---|---|---|---|---|---|----|----|----|----|----|
B|---|---|---|---|---|---|---|---|----|----|----|----|----|
G|-2-|-3-|-4-|-5-|-6-|-7-|-8-|-9-|-10-|-11-|-12-|-13-|-14-|
D|-2-|-3-|-4-|-5-|-6-|-7-|-8-|-9-|-10-|-11-|-12-|-13-|-14-|
A|-0-|-1-|-2-|-3-|-4-|-5-|-6-|-7-|-8--|--9-|-10-|-11-|-12-|
E|---|---|---|---|---|---|---|---|----|----|----|----|----|