F# Power Chord (5) (F#5)
Also written as Gb Power Chord (5) (Gb and F# are the same key).
1+5
Notes in F# Power Chord (5)
F# (root)C#
Inversions
Same notes as F# 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
F# in the bass
1st inversion
C# in the bass (F#5/C#)
Press F# and C# together on the keyboard and you're playing F# Power Chord (5).
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.