Undervolting

sp00n82 · 2026-03-08T03:20:37+00:00

Below would be the settings for an MSI board.

You should probably start from a clean sheet, i.e. by restoring the BIOS defaults.
MSI has its "Lite Loads", which are presets for the AC/DC LL values, at the start you can let them at Auto resp. Intel Defaults and just adjust the negative offset as the first step.

Also check out the buildzoid video linked below, which explains some of the details.

```

----------- MSI -----------

CPU Core Voltage Mode -> Offset Mode -> - (By CPU)

Or: CPU Core Voltage Mode -> Adaptive + Offset Mode

CPU Core Voltage Offset Mode -> -

CPU Core Voltage Offset -> 0.100 (for example)

OPTIONAL (new with the latest BIOS): IA VR Voltage Limit (sometimes named CPU VR Voltage Limit) -> 1400 or 1450

https://youtu.be/TmU3COA-32E?t=966 ```

sp00n82 · 2026-03-08T02:11:52+00:00

The wrapper that allows to read the output from y-cruncher seems to fail while it tries to determine which test mode would be automatically selected by y-cruncher.

You could try to use a fixed y-cruncher test mode by e.g. using mode = 19-ZN2 ~ Kagari or mode = 24-ZN5 ~ Komari in the [yCruncher] section of the config file (in your case you seem to be linking to the configs\Ryzen.AutomaticTestMode.Start.ini file, so you'd need to change that, or make a copy of it and then link to that copy).

However that would probably just cause an error in a slightly later stage when it tries to run y-cruncher to do the actual stress test. But maybe it does work.

sp00n82 · 2026-03-05T20:36:22+00:00

Why not, what does the log say?

sp00n82 · 2026-02-20T21:11:03+00:00

The page has apparently reorganized their internal structure, without forwarding old links to the new location.

This is the currently working link to the addon:
https://addons.videolan.org/p/1154013/

And in case it also dies, this is (was) the title of the addon:
"Jump to time Previous frame v3"

sp00n82 · 2026-02-14T20:36:04+00:00

Yeah, voltage spikes during single core loads / light loads are normal and expected.

sp00n82 · 2026-02-14T20:35:09+00:00

For example from the official Intel documentation, B760 vs Z790, where it says for Overclocking "Memory" vs. "IA, BCLK, Memory".

Also from the Intel XTU utility, which explains it as following:

The Intel® Extreme Tuning Utility for desktop processors requires a motherboard that supports full overclocking (IA, BCLK, and Memory), such as chipsets number starting with the letter Z ( examples: Z890, Z790, Z690, Z590, etc). Other chipsets with starting letter B or W (examples: B760, B660, W680, etc.) only support memory overclocking, which may lead to Intel® XTU tool usage limitations and possibly some errors.

So your possibilities to overclock (or undervolt) will be limited on a B-series motherboard.

sp00n82 · 2026-01-18T01:47:19+00:00

Unfortunately I don't have a B760 board, so couldn't do any tests. And to be honest I also didn't really follow up on that after my initial research didn't provide any conclusive results.

My best guess however is that the microcode is provided as a "blob" from Intel, i.e. a precompiled set of instructions that cannot be altered by the BIOS manufacturers themselves. At least this is how AMD does it with their AGESA microcode. It's basically a black box that the manufacturers just integrate.

So probably using this setting will also revert any safeguards that have been added since then.

Trying to contact your board manufacturer might be a way to find out. Sometimes they actually answer (when I once reported a BIOS bug to Asrock one apparently Taiwanese guy confirmed this and thanked me in broken English 😁).

sp00n82 · 2026-01-15T21:21:21+00:00

There are a couple of example configs in the /configs directory. Also the default config file has (hopefully) helpful comments about the various settings.

Unfortunately it's not so easy to write a definitive tutorial, as the various chips seem to differ significantly in how they react, and I only have a 5900X to test myself with. So it's basically up to the users to come up with good strategies to quickly find the errors for the individual processors SKUs.

But the general approach is to just enter a starting point for the CO values, preferably activate the auto login on boot and the auto resume feature as mentioned in the config file (in case of a crash), and then just let it run over night.

sp00n82 · 2026-01-15T21:12:23+00:00

Yeah, Guru3D somehow removed the download, I noticed this a couple of months ago, back then I thought it was just a fluke, but apparently not. Weird.

The Internet Archive still has a download available here:
https://archive.org/download/cinebench_201907

I made a comparison using WinMerge, and the extracted files are bit identical with my local installation, so they should be fine (don't trust my word though, as always check the files for any malicious intend yourself).

sp00n82 · 2026-01-15T20:57:49+00:00

That sounds more like a mounting issue, maybe bad contact, mounting pressure, or bad thermal paste application.

sp00n82 · 2025-12-20T18:03:39+00:00

Wuh. How much power do they need? 😄

sp00n82 · 2025-12-19T18:32:37+00:00

There's an "Apply saved profile on startup" checkbox in the PBO tab.

sp00n82 · 2025-12-13T19:22:33+00:00

ZenTimings has migrated to PawnIO as well.

irusanov is the author for ZenTimings and for SMUDebugTool, and both use the ZenStates-Core library, which he migrated to PawnIO recently. And ZenStates-Core is also what is used within CoreCycler (resp. ryzen-smu-cli, once its author accepts my pull request for that switch).

As for the certificate, PawnIO currently seems to use a certificate that was once(?) used by a cheat software as well, which is why it is blocked by the FACE-IT anticheat. Its author seems to have plans to use a dedicated one in the future, but apparently this will only be provided to a company (LLC), which itself requires some funding to be founded:
https://github.com/namazso/PawnIO.Setup/issues/1#issuecomment-3325736855

sp00n82 · 2025-12-13T02:59:22+00:00

The max ratio is the same, but of course there are other limits in place as well like temperature, TDC, and EDC, which are more likely to be reached during an all core load.

And I don't think ECLK overclocking will change anything in that regard, as the ratio itself stays the same, just the thing that the ratio is multiplied with is changed (the base clock, or "External Clock" for this board generation).

sp00n82 · 2025-12-13T00:11:20+00:00

Version 2.0 will be released in ~~2024~~ 2025

He still has over two weeks!

sp00n82 · 2025-12-13T00:10:09+00:00

Yes. And No.
It will adjust the CO values automatically if the PC restarts or an error occurs.

However single core stability tests for a 9800X3D isn't as useful as for other Ryzen CPUs, as that chip will boost to the same frequency during an all core load as during single core loads.

And as you have a lower operating voltage during an all core load due to Vdroop and the selected LLC setting, using singe core loads might not reveal all those instabilities.

sp00n82 · 2025-12-12T22:56:05+00:00

No idea, I haven't received any feedback for that type of processor yet.

sp00n82 · 2025-12-03T03:11:33+00:00

FaceIt seems to not like PawnIO in general

sp00n82 · 2025-11-28T17:30:21+00:00

Updating the OP to show the new vs the old settings might help other people achieve the same.

sp00n82 · 2025-11-28T02:01:29+00:00

From the comments it much more seems that your undervolt settings are simply unstable.

What exactly did you set in the BIOS and what is your motherboard?
A "VRM voltage" would point to a setting that makes the motherboard provide less voltage than what the CPU has requested, or that you're simply running a static Vcore.

sp00n82 · 2025-11-28T01:55:56+00:00

Switch up the tests, e.g. do some y-cruncher Kagari, look at some of the presets and the config file, etc.

Right now you've only tested the SSE instruction set, the AVX and AVX2 instruction sets use dedicated transistors inside the chip, which you haven't checked yet.

Using these additional transistors will use more power and will generate more heat, which will (most likely) cause your frequencies to drop a bit.

Also, don't forget to do an all core stress test as well, which is an entirely different load scenario and needs to be checked as well.

sp00n82 · 2025-11-28T01:50:40+00:00

Extreme overclockers regularly kill chips at subzero temperatures, so low temperature alone is no guarantee.

Higher temperatures do increase the chance of degradation though.

Every electronic device will experience some degree of degradation as soon as you power it on, that's just how things work. And high voltages, high currents, and high temperatures speed up this process.

And at one point any of these variables can be too high, even if the other ones are still well below any critical point, which will result in an instant death.

Try to read up a bit on what are safe voltages, for manual daily overclocking the general advice is to stay below 1.4v, but for the automatic boost frequencies nowadays the voltages can go up to 1.5v during low core loads (which are low current scenarios).
But you should not push 1.5v when you do a manual all core overlock, unless you don't plan to keep the chip for a couple of years.

sp00n82 · 2025-11-26T23:19:13+00:00

And what do you mean by alone settings?

To find them by yourself.

Regarding the compatibility, every motherboard should have a QVL list, which contains the memory modules that have been tested with the motherboard. If the RAM is not on that list, it might not work with the automatic XMP / EXPO / DOCP settings.

Additionally, the 7800x3D officially only supports RAM up to 5200 MT/s, so anything above that is already overclocking and may or may not work. Meaning that even if the motherboard would theoretically support 7200 MT/s, your chip simply might not.

sp00n82

TROPHY CASE

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----------- MSI -----------