Bug in B660 bios cpu voltage offset

[trihy]

Hi. I made several tickets on Asus support but there is no way to make them understand the problem.

There is a bug on b660 bios, on all b660 boards. And all 600 series. On z690 is less visible cause there is adaptive voltage, which most people use. On b660 there is only offset.

Problem is, setting a CPU voltage offset of -0.005 will cause ramdon freeze at idle. As you increase the offset, the random freeze ratio will increase.

Also setting + offset will do the same.

This is because applying any offset will cause more than -0.200mv drop at idle.

This was happening on msi boards too and was fixed with a bios update.

Thread on msi forums https://forum-en.msi.com/index.php?threads/msi-b660-tomahawk-ddr4-cpu-core-voltage-offset.372022/



Please someone from Asus explain why cpu voltage drops to 0.300 or less when using default bios settings. Lowest per spec value is 0.700 for alder lake.

Thanks.

[trihy]

Thanks. Great to know.

[STARRAIN]

Hi Shosiu,
If CPU performance is getting down after lower vcore on ROG STRIX B660-I GAMING WIFI , please disable APE first and tuning vcore again.
Thank you.

[Shosiu]

I can't do that as I'm facing the same issue with system freezing after applying voltage offset.

[STARRAIN]

Hi Shosiu,
May I have your serial number of the motherboard via pm?
Thank you.

[Shosiu]

PM Sent

[STARRAIN]

Hi Shosiu,
Please help to check your pm or wait for formal bios releasing in the future for the freezing issue.
Thank you.

[Shosiu]

Unfortunately, it didn't solve my issue - even a small offset like 0.04V makes my system unstable (often hung when loading windows)

[STARRAIN]

Hi Shosiu,
Do you have freezing issue at idle or only during loading windows?
Do you have the issue on bios 1620 with bios all default settings(no OC, no offset adjustment)?
If you disable C-states in bios, does the freezing issue disappear?
Thank you.

[Shosiu]

With negative offset (APE disabled, C-states enabled), I have freezing issues when loading system - it's not possible to load system at all.
With all settings dafault, it works fine.

With negative offset (APE disabled) and C-states disabled, it works, but it has huge impact on CPU performance - with offset of 0.08V (negative) Cinebench r23 score is almost 6700 points, while with default setting it's 12500. Alle the monitoring softwares are still showing CPU clock of 4,1GHz for all cores what makes no sense.

[STARRAIN]

Shosiu wrote:
With negative offset (APE disabled, C-states enabled), I have freezing issues when loading system - it's not possible to load system at all.
With all settings dafault, it works fine.

With negative offset (APE disabled) and C-states disabled, it works, but it has huge impact on CPU performance - with offset of 0.08V (negative) Cinebench r23 score is almost 6700 points, while with default setting it's 12500. Alle the monitoring softwares are still showing CPU clock of 4,1GHz for all cores what makes no sense.

Hi Shosiu,
Did you get the above results on formal bios 1620 or special bios?
What value do you setup with negative offset (APE disabled, C-states enabled) and have freezing issues when loading system every time? like -0.08V or -0.05V?
When you use special bios, did you also disabled APE? How often did freezing issue occur when loading windows? like once in three times?

May I have the following information?
- the brand and model name of your CPU, ram, graphics card, PSU and OS drive
(Please check the specific model name of ram such as G.SKILL F4-4600C18D-16GTRG.)
- OS version and OS build
-in addition to negative offset, APE and C-states, did you adjust other bios settings?
- the screenshots of Cinebench r23 score with negative offset (APE disabled) and C-states disabled, negative offset (APE enabled) and C-states disabled, and default settings

Thank you.