Connected Standby

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Connected Standby is a Microsoft specification for Windows 8 hardware and software that aims to bring smartphone-type power management capabilities to the PC platform, as well as increasing physical security.


The specification describes a Microsoft proprietary standard for Windows 8 software and hardware that developers and hardware vendors can optionally comply with to meet user requirements for devices being able to be turned on or off instantly. The mode also allows the operating system to continue performing background tasks, such as updating content from apps. Devices must be able to turn on in less than 300 milliseconds.[1] The hardware requirements extend to battery life, in that systems must not drain more than 5% of battery capacity while idle over a 16-hour period.

Windows 8 will take advantage of Connected Standby if all of the following hardware requirements are met:

  • A firmware flag indicating support for the standard
  • The boot volume must not use a rotational disk
  • Support for NDIS 6.30 by all network devices
  • Passive cooling when Connected Standby

There are additional security-specific requirements, for example for memory to be soldered to the motherboard to prevent cold boot attack vectors that involve removing memory from the machine, as well as support for Secure Boot.

On Windows 8.1, supporting Connected Standby and having a Trusted Platform Module (TPM) 2.0 chip will allow the device to use a passive device encryption system.[2][3]

Systems that support Connected Standby are incapable of booting Legacy BIOS operating systems.[4]

See also[edit]


  1. ^ Intel-2013, p. 1.
  2. ^ "Windows 8.1 includes seamless, automatic disk encryption—if your PC supports it". Ars Technica. Retrieved 18 October 2013. 
  3. ^ Thurrott, Paul (June 4, 2013). "In Blue: Device Encryption". Paul Thurrott's SuperSite for Windows. Penton Media. Retrieved June 10, 2013. 
  4. ^ Windows Hardware Certification Requirements for Client and Server Systems, Microsoft, 2013-1  : "System.Fundamentals.Firmware.CS.UEFISecureBoot.ConnectedStandby ... Platforms shall be UEFI Class Three (see UEFI Industry Group, Evaluating UEFI using Commercially Available Platforms and Solutions, version 0.3, for a definition) with no Compatibility Support Module installed or installable. BIOS emulation and legacy PC/AT boot must be disabled."