Note that the explicit command for entering the D3 state may be the removal of power. Device is on and running. It is receiving full power from the system, and is delivering full functionality to the user. Attains greater power savings than D1. Device is off and not running.
Device context is lost.
Power may be removed from the device. D1 Optional Input device power consumption is greatly reduced. In general, device is in a power management state and is not delivering any functionality to the user except wake functionality if applicable. Any input device. All context and state information that cannot be preserved by the device when it's conserving power.