Also found this: Post by User 'pg123' on a different board, posting something he found on Anandtech forums, posted by The Stilt:
Don't get confused by the AGESA version numbers, because they're different for each branch.
- SummitPI 1.0.0.6x (Bristol and Summit Ridge)
- RavenPI 1.1.0.1 (Bristol, Summit and Raven Ridge)
- PinnaclePI 1.0.0.0x (Bristol, Summit, Raven and Pinnacle Ridge)
- ThreadRipperPI 1.0.0.5 (Zeppelin SP3r2 MCM)
PinnaclePI is the most current development branch for AM4 platform.
Should be used for all AM4 parts, as soon as it reaches full maturity.