After you do this, try using sleep mode even for a minute or two. It will be interesting to see if any C8, C9, C10 package standby is reported.
No. Individual core standby and CPU package standby are two different things. It is easy for some bad code to block the CPU from entering the deep package C states.
This is a Microsoft limitation. Microsoft have gone out of their way to hide the High Performance power plan on computers that support connected standby. This power plan still exists. It is just well hidden. When you use ThrottleStop to access this plan, it will immediately show up in your Windows Power Options. As soon as you switch back to the Balanced power plan, the High Performance one will disappear again.
Here is some more info about connected standby. You can use the powercfg command to see if your laptop is setup to use this feature. There have been a lot of problems so I am sure that some manufacturers have decided to disable this rather than deal with complaints that it does not work correctly.
- The system must support Connected Standby. To verify that this sleep state is supported, open a command prompt window, and run the following command:
powercfg /a
If your system supports Connected Standby, Standby (Connected) will be in the list of available sleep states.- Ensure that the system is running on DC (battery) power. Energy efficiency jobs are designed to run only on mobile devices. If a battery is not detected, you will receive an error.
I did some testing last night on my daughter's 8550U. Package C8, C9 and C10 are only reported during sleep / standby when running on battery power. When plugged in, it shows 0.0 for all three values.
