Eb Power Chord (5) (Eb5)
Also written as D# Power Chord (5) (D# and Eb are the same key).
1+5
Notes in Eb Power Chord (5)
D# (root)A#
Inversions
Same notes as Eb Power Chord (5), with a different chord tone as the lowest note. Useful for smoother movement between chords instead of jumping around the keyboard.
Root position
D# in the bass
1st inversion
A# in the bass (Eb5/A#)
Eb Power Chord (5) consists of D# and A#, played at the same time.
Just a root and a fifth, no third at all. That makes it neither major nor minor, which is why rock guitar and simple piano left-hand parts lean on it so much. It sounds strong and neutral, and it leaves room for a singer or another instrument to decide the mood.