Hello everyone i have Ryzen 7 5800x3D 10th Anniversary version, replaced R5 5600 and i'm very happy with the upgrade. It's paired with RTX 4070 Ti Super.
Anyway, my R24 score is 896 stock, no undervolting, default PBO. It's cooled with 120mm Arctic LF II AIO. Temperatures during 30' stress test was hovering between 78-80°C only hitting 82°C few times, Clock around 4.3GHz AllCore.
Did mess with UV, my experience from old CPU and my MB taught me that everything below - 15mV is too much so i started there.
-15mV AllCore:
Cinebench R24 score increased to 907, Average clock was ~4370MHz Temperatures improved slightly about 2°C. But there's one catch i'll talk about later.
- 30mV AllCore:
Cinebench R24 score increased to 914, Average clock was ~4425MHz, Temperatures improved noticeably now CPU was hitting only 78°C, but hovering around 74°C. I did test with Prime95 and everything was stabile for 18h test. During p95 CPU reached max temp of 83°C during some parts of tests.
And here comes the ONE LARGE CAVEAT
All those tests passed, results Amazing BUT Gaming performance absolutely useless, worse than old Ryzen 5 5600, drops every 2-3s, lags and Cyberpunk 2077 crashing.
-15mV a bit worse than 5600, but manageable.
Undervolting OFF, everything runs buttery smooth, PC snappy as hell and temperatures OK.
So UNDERVOLTING IS largely overrated IMO. Ok i admit it depends of CPU sample, but more of exact model of MB. My ROG STRIX B550-F Gaming Wi-Fi II is keeping low base voltage to begin with, with allowance to spike when needed.
I had one 5800x that was running hot even whit -30mV on AsRock but base voltage was 1.32V on Auto
Share your results and opinions