Package C6 State Zen2 X570

[TGP]

What affects HWinfo to display "Package C6 Residency" on a Ryzen based system?
There is no such entry on my system, but other users with the same motherboard have a working readout. Is there anything in the BIOS that could affect especially the Package C-State? Every single energysaving function is on.

 

[Martin]

This can depend on the BIOS/firmware version.

 

[TGP]

I tested with different BIOS versions, both were working on other Mainboards. I just can't figure out which setting might stop Package C-State from working. Low current idle is activated in the BIOS. Even a clear CMOS didn't help.

 

[Zach]

What affects HWinfo to display "Package C6 Residency" on a Ryzen based system?
There is no such entry on my system, but other users with the same motherboard have a working readout. Is there anything in the BIOS that could affect especially the Package C-State? Every single energysaving function is on.

If you mean that you have the reading on sensors window but it’s a constant 0% it might be the power plan you are using. And the specific settings inside that power plan.

If you don’t see it at all then try the latest version of HWiNFO.

 

[TGP]

It's not there at all. I even reinstalled Windows to test this further. I tried different HWInfo Versions, also the latest beta.

 

[Zach]

What Ryzen is the CPU, and what mainboard?

 

[TGP]

3900X, MSI X570 Unify. Other people with 3700X/3950X on the same mainboard don't have the problem, not even on other bios versions.

 

[Zach]

There are other C-State controls in BIOS other than Low Current Idle. Do you know of them?

And may I ask what is your current readings on C0, C1, C6 Residency on HWiNFO with typical low/middle workloads? Like idling, browsing, watching videos, youtube... stuff like that.

Like this after a few hours

 

[TGP]

Yes, everything tested on auto and manually activated. Even with a complete new bios flash on stock settings and with a new Windows Install, there is no package C-State. At this point I also tested another Mainboard. Maybe there is a flaw in the CPU or it's a softwareproblem with HWinfo.
C6 Core States work properly, 8 Cores have around 90% C6 with light loads. The 4 other cores get a bit less.

 

[TGP]

One hour light usage.

 

[Martin]

You have lots of items hidden, are you sure those values are not among them?

 

[TGP]

Yes, I even used a new installation for my tests, where everything was unchanged in the config.

 

[Martin]

This might be a due to a marginal issue in HWiNFO. I will try to fix this in the next Beta build.

 

[TGP]

Thank you, meanwhile I discussed this issue with MSI and tried a Mod BIOS, no success. Hope you get it solved.

 

[Martin]

Please try the new Beta build 4235, that might fix it.

 

[TGP]

It works, big thanks to you. Can you tell me what is the difference of my system in comparison to others, that HWinfo was not able to pick it up?

 

[Martin]

This was an internal issue in how HWiNFO was reading the Package C6 value. Quite difficult to explain, but nothing you should worry about in terms of difference.