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Bug in B660 bios cpu voltage offset

trihy
Level 9
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/

94080

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.
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119 REPLIES 119

trihy
Level 9
It's just a matter of time until this fixes will come for every other board.

You're right, the bug is still there in 1620 bios, just tried it and had a crash at -0.015 as soon as Windows finished loading.

STARRAIN_ROG
Customer Service Agent
Hi MonstyB,
I'll consult our tech team more about your case.
Thank you for your information.

Gentlemen, I do not want to say anything 🙂 but check how you have ddr4 memory set, asus bios default sets command rate 1T, try to switch to command rate 2T 🙂

This has nothing to do with RAM timings 😉

My board is DDR5, not DDR4

And my RAM is running at 2T

STARRAIN_ROG
Customer Service Agent
Hi MonstyB,
I sent PM to you. Please help to check it.
Thank you.

STARRAIN@ROG wrote:
Hi MonstyB,
I sent PM to you. Please help to check it.
Thank you.


I just checked my inbox, I have an empty message from you. I guess you tried to send me something but it did not work.

Maybe you should try again ?

Thanks.

edit : sorry, i've just seen the bios in the quote, in my original message, i'm gonna give it a try !

STARRAIN@ROG wrote:
Hi MonstyB,
I sent PM to you. Please help to check it.
Thank you.


Okay, I tried the 1620 beta bios.

Unfortunately it does not solve anything.

I may be wrong, but even though there are no freezing issues anymore, this seems to be purely due to the beta bios having different C states settings (default C states package limit to C6 instead of auto.)

With beta bios' optimized default settings, if I apply a negative offset of, let's say, 0.025V, CPU performance is just getting poor (same results with C states disabled in the original bios actually) => CPU-Z gives 4000 points instead of 5000 points.

Your tech team should be able to validate performance with a 12400 / 12500 and a negative offset of 0.025V or 0.050V, there should be no performance impact. My previous board (MSI B660M Mortar) gave me wonderful results at -0.050V for the exact same CPU, with a multi-thread CPU-Z score of 5000 points and the CPU eating only 55W.

Hope this will help you solve the issue globally !

Regards

STARRAIN_ROG
Customer Service Agent
Hi trihy,
I'm afraid the issue is still under analysis, so current formal bios on our site would be the same result.
Please use the special bios temporarily.
If there is any news, I'll keep you updated.
Thank you.

STARRAIN_ROG
Customer Service Agent
Hi MonstyB,
Thank you for your reply.
May I have screenshots of multi-thread CPU-Z score?
- no offset adjustment on the 1620 beta bios
- negative offset of 0.025V on the 1620 beta bios
- negative offset of 0.025V on the 1620 formal bios(C-state disabled)
- negative offset of 0.025V on the 1620 formal bios(C-state enabled)
Thank you.