Running Cinebench R20 in stock core clock and voltage mode for the Ryzen 3800X, I've seen peak voltages of at least 1.473 V, temperatures of 73°C, and all-core boost clocks of 4,250MHz. During this benchmark, CPU power hits 112 watts. I have experimented with PBO and Auto Overclocking, but these usually results in lower boost clocks, not higher! In stock mode, Cinebench R20 single core, affinity set in Task Manager to best core, nets a peak single-core clock of 4,507MHz @ 49°C.
Currently I have a stable manual all-core boost overclock of 4,500Mhz clock at 1.35 peak volts. Cinebench R20 results are higher than stock - 5404, with a peak temperature of 64°C and 104 watts indicated in Ryzen Master. ( https://www.hwbot.org/submission/4350137_obeliskag_cinebench___r20_with_benchmate_ryzen_7_3800x_5405_pts )
Due to the lower peak voltage, power consumption and temperature, I am tempted to use these manual overclock settings all the time, but am concerned what the long term health of the processor, as the stock settings have a 1.23 V minimum peak voltage visible in Ryzen Master. (In HWiNFO, minimum CPU Core VID (Effective) voltage for stock mode can be 1.081 V.)
As I haven't been able to find the data sheet for the AMD Ryzen 7 3800X, I am wondering if it safe to maintain the 3800X at a sustained 1.35 volts?
Thanks for your feedback.
Asus PRIME X570 PRO, AMD Ryzen 3800X (lapped w/Kryonaut), Corsair H115i PRO RGB (upgraded to higher RPM Corsair ML140 fans), G.Skill F4-3600C16D-32GTZN, Samsung 1TB 970 EVO Plus, Gigabyte 2080 Super Windforce OC, Corsair RM850, Fractal Design S2 Meshify + original H115i fans (5 case fans + 2 radiator fans)