Using Be Quite 280mm AIO water cooling and hover around 78c using Cinebench R20 so it gets hot but 5Ghz max is exciting to see. Check to see of PBO is on. Turn PBO off and see what your temps look like.
as Igor showed today - the heatspreaders arent that plane as they used to be
grind off heatspreader plane with correct sandpaper and polish it off 😉
use a GOOD Thermalpaste like ThermalGrizzly Kryonaut
use a good Cooler (minimum is Thermalright Macho 120 Rev.B; better a Thermalright SilverArrow-Extreme; or 360er AiO)
Turn off PBO in the bios. It seems to push the core voltages really high and therefore temps. Then if you want do an all core overclock go for it. Mine is now running all benchmarks much faster at lower core voltages and temps. Have it at 4.7, 1.294v on all cores (not set just using auto). Cinebench r20 temp max 75 using a small aio 120 cooler. Scores 6229 and 605. Was 85+ degrees using defaults.
I have Gigabyte B550 Aorus Master with F11n bios. It seems the PBO setting doesn't affect 5800X. 5800X behaves as if PBO is on even though it's off in the bios. I've tested the PBO setting with a borrowed 5950X. I could see the maximum boost clock and temperature differences between PBO on and off.
Could you open hwinfo and make full load test with pbo on and off and show hwinfo values? E.g. there is Core 0 Power to Core 8 Power, etc. it would clarify as how CPU is working.
I'm glad I read this. I'm using x570 aorus ultra with arctic liquid freezer 360 (thermal grizzly paste) and I was getting 85ish stock in R23 multi. I've tried everything to get it down, finally landed on curve optimizer (-5 on best two and -15 on the rest). Brought me down about 8C.
But now that I'm checking in all apps, Ryzen Master is consistently 7-10C lower that HW Info, CAM, Riva Tuner and CoreTemp. I guess they just aren't monitoring correctly yet...
Thank u very much man for the -.1 tip ! Using a be quiet! Pure Loop 360 with an ASUS TUF Gaming B550-Plus (Wi-Fi) (2006 BIOS) my Ryzen 5 5800X I had reach 82C (Package) in CB R23 at first pass. With your advice it dropped to 60C (CPU) / 71C (Package) and I was able to set the rad fans no more than 1000 rpm. Awesome.