A Dell XPS 12 user reported that some XPS 12 systems had a Power Management tab for the Intel 7260 Wireless device while others did not. (This behavior has been validated on different Intel wireless devices).
Investigation showed that system with i7 processors had the Power Management tab, while i5 systems did not.
This issue was validated to occur regardless of system image or BIOS version. Systems with the exact same configuration except processor, power Management tab was only displayed on i7 systems.
The systems with i5 processors, support connected standby, the i7 systems do not.
Systems with connected standby capability will not have a Power Management tab on devices in Device Manager.
To verify the function, run powercfg /energy from an elevated command prompt. The Connected Standby system will not support S3 sleep state.
To have the option with in device manager the system will need a processor with support for the S3 sleep state.