Recently experimenting with undervolting my 5800X3D. Temps are roughly 10C cooler and it clocks slightly higher all while drawing less power. I am using PBO2 Tuner at the moment, but I would love to actually set voltage offsets from my BIOS. From my understanding somehow it's locked/unavailable for the 5800X3D, but some people got it working by loading a BIOS profile for their old CPU (see this thread). Does anybody know if there's a workaround? I am running ASRock SteelLegend B450 Motherboard (P4.30). Does anybody have a fitting CPU profile I coud load to "unlock" PBO settings? Or maybe there's a new firmware version that fixed this?

Hi!

Just got a 5800X3D and prepared everything for the PBO Curve Optimizer software workaround since the CO is not available in the BIOS for 5800X3D (link).

Coming from a 5600x (where I had set the CO manually) the BIOS did reset upon switching the CPU. And as expected there was no CO available anymore.

However after loading the previous BIOS profile of the 5600x (to get memory and fan settings back in place) the Curve Optimizer also reappeared.

For testing I applied -30 to all cores and booted in windows. It seems to work:

• CPU-Z stress test went from 1.212V @ 4265Mhz to 1.181V @ 4440Mhz.

• The PBO2 Tuner software also showed -30 for all cores

• Ryzen Master doesnt show anything sadly (CO mode 'nan').

The mainboard is a Gigabyte B550 AORUS PRO (F15d). When entering the BIOS the CO still isnt there, but reappears every time I load a previous profile - even new ones saved after switching the CPU.

I didn't find any posts on this topic. Is this a known behaviour? Are there possibly any downsides in comparison to the software solution? Any other mainboards where this works?

The Asus Crosshair line got the new Bios Update and AGESA version Combo V2PI 1208 enabling Core optimizer by default. Rejoice!

Since the 5800X3D does not boost so high i saw many people run a -30 Curve optimizer all core without issues. Currently testing it is looking good so far.

Anyone using 5800X3D with curve optimizer can confirm -30 running stable?

utility is in this thread: https://www.overclock.net/threads/5800x3d-owners.1798046/. you can only set offsets, cannot adjust power limits or max boost (which is to be expected).

applied a lazy -15 offset to all cores, stress tested with occt core switching for stability (stable), did a few runs with cinebench.

before, I hit 90C before the first render in cb23. now, the CPU stabilizes at 82C after 3 renders.

benchmark scores are also a decent 2-3% higher.

absolutely insane.

Hey everyone, I recently purchased a 5800X3D, to put in my asus B550 Gaming-f wifi. I've set up the CO on the bios, but I have no idea whether it's working or not. I don't notice it boosting beyond 4.5, nor I see a decrease in temps. Am I doing something wrong?

Hi guys i was trying to undervolt my cpu as many have advised on it, ive updated my bios to the latest version and my ryzen master is also on the latest version, i do see a curve optimizer tab on the ryzen master but i cant do shit with it.. and theres no curve optimizer in the bios settings.

Does anyone happen to have the same mobo cpu combo? Anyone able to advise on this?

Bought a 5800X3D during last year's black friday sales. Been using it bone stock aside from XMP and coupled mode being enabled. Performance has been great but it has been running incredibly hot and not meeting estimated boost targets. Didn't really bother me because my framerates were already very high at the settings I prefer so I kind of forgot about it. However Gigabyte recently released a beta BIOS for my board that enables curve optimizer for the 5800X3D and it got me interested in testing some undervolts.

Tested in -10 increments, each with a 24hr CoreCycler run and 24hr desktop stare. Each time passed with no problem. I'm now on -30 offset on all cores and it still doesn't fail during CoreCycler/in-game or just idling at the desktop/youtube. However I understand achieving -30 all-core is incredibly rare and almost certainly results in some clock stretching. However during CBR23 runs I'm getting an all core score of roughly 15200 which seems in line with a successful -30 curve. All cores boosting to 4.45GHz consistently and temps are far, far lower.

I'm familiar with GPU overclocking and understand that pushing the memory too hard, even though it might function, incurs a performance penalty in the form of increased error correction. Is something akin to this possible when applying an overaggressive Zen3 CPU undervolt? How can I tell if my -30 is actually hurting performance aside from testing every step and confirming nominal vs effective clockspeed in HWinfo? How rare is a successful -30 all core anyways?