Hi Tom, I too created an account to thank you for your amazing post! Your info is the most helpful to me of any of the Ryzen 7 OC articles or tips I see. After running a Ryzen 7 1700 for 2 years, I snagged a 2700X from Amazon for only $193 recently. I noticed that much higher than 4 GHz on all cores requires a lot of voltage, more than I want to run for my daily driver workstation. Thanks to you, I am able to run at 4 GHz at an incredible 1.175 Volts under all core load in Cinebench R15, with a score of 1795 consistently, with temps not going higher than 65 C. In Cinebench R20, not only am I dead stable after many repeated runs, but my temps are staying under 71 C (while beating on the chip hard). R20 scores are just shy of 4000 points. I'm monitoring all temps and voltage with Core Temp.
When not under full load, my Ryzen runs at ~1.23 Volts under normal working conditions, while lowering further under idle. I'm using an ASUS Crosshair Hero VI first gen board with a Noctua NH-U14S air cooler - because it's incredibly quiet. Yes, my voltage dips in all core usage, which seems common on these boards, ergo the mere 1.175 Volts on all 8 cores. It amazes me that it's always stable for weeks on end with running tests, playing games, and working on it all day.
While I know I can clock my chip higher, running at low voltage and low temps are more important to me. There is no way I could have figured out the right offset voltage, while retaining full P States without your post. Thank you again!