In my case, it is on a Rog Strix B550-F Gaming (wi-fi), bios 2806 (only description is "Improve system compatibility", but it does unlock PBO settings and it is working perfectly fine on my end, zero issue so far). Now with PBO unlocked for 5800X3D (+ voltage offset that was already available from previous bios), my temp is barely hitting 60C (air cooling, Mugen 5 rev. B) on Cinebench R23. In (fairly recent) games, averages in the 50's (i.e.: SotTR +-49-52C ; Cyberpunk +-55-57C ; Spider-Man remastered 53-56C ** Edit: more around 58-60C when in the streets with lot of people) Edit (following @pegasus1 's input): Above testing done with ambient temp @21C (and all games @1440p, max settings including RT, no DLSS except for Cyberpunk@quality) Enjoy your new cool'n'fresh 5800X3D !!