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ENERGY STAR®-Compliant Computers and Monitors

Choose from the items below to learn more about purchasing ENERGY STAR-compliant computers and monitors.

You Should Know.... Common misconceptions or myths about monitors, screen savers, computer games, and more.

Specifications. Criteria that designate this product as energy-efficient.

Procurement Language. Drop-in language to use in your upcoming bids or RFPs to ensure that your vendors will provide products that meet energy-efficiency guidelines.

Simple Savings Calculator. An interactive software tool to compare the costs of purchasing energy-efficient products and conventional equipment.

Compliant Products, Computers. A list of products that comply with ENERGY STAR specifications as well as additional product information that may include manufacturers, brand names, model numbers, wattage, and other related specifications.

Compliant Products, Monitors. A list of products that comply with ENERGY STAR specifications as well as additional product information that may include manufacturers, brand names, model numbers, wattage, and other related specifications.

ENERGY STAR Computer Homepage. Link to this product's ENERGY STAR Program homepage.

ENERGY STAR Monitor Homepage. Link to this product's ENERGY STAR Program homepage.

Additional Resources. A list of links to Federal Executive Orders and ordering information for Purchasing and related brochures and materials. You'll also find links to organizations, publications, and programs that focus on energy efficiency and may offer educational and/or product information.

To view and print .pdf documents found on this page, you must first download and install the free Adobe Acrobat Reader.

You Should Know...


General: By leaving the machine on around the clock, you run up your electric bill, you suck in dust and you make yourself more vulnerable to power surges.

An ENERGY STAR label is not a guarantee that your machine is saving energy. Always check to ensure that the ENERGY STAR features are enabled.

Computers: A well-designed ENERGY STAR-compliant computer will not lose its network connection, which could lead to a loss of data, while in the low-power or sleep mode. Most of the computers that are being manufactured today include a capability to sleep intelligently on a network. The new ENERGY STAR specifications, effective July 1, 1999, require all computers that are shipped with network capability to sleep on networks and to respond to computer requests to wake up.

Monitors: Switching on and off the monitor five times or more a day increases the frequency of faults in power transistors in the control and deflection parts only after the machine has been used 20 to 30 years.

Screen Savers: Despite common belief, a screen saver does not save energy. In fact, more often than not, a screen saver will not only draw power for the monitor but will also keep the CPU from shutting down.

Games: Many popular computer games, when running in the background while multitasking, will not allow the computer to go to sleep—even if the game is paused.

Specifications


Criteria:
Criteria for ENERGY STAR-Compliant Computers
Computer Model Ship Date Guideline Power Consumption
Before July 1, 2000
  • Shall enter a sleep mode within 30 minutes of inactivity
  • If shipped with network capability, shall sleep on networks and respond to wake events
  • Power Supply Watts (W) in Sleep Mode
    < 200W

    > 200W

    < 30W

    < 15% of power supply's maximum continuous output rating

    On & After July 1, 2000
  • Shall enter a sleep mode within 30 minutes of inactivity
  • If shipped with network capability, shall sleep on networks and respond to wake events
  • Guideline A:
    < 200W
    > 200W < 300W
    > 300W < 350W
    > 350W < 400W
    > 400W

    < 15W
    < 20W
    < 25W
    < 30W
    < 10% of power supply's maximum continuous output rating


    Guideline9B*99999 < 15% of power supply's maximum continuous output rating
    *Note: Manufacturers may qualify computers as ENERGY STAR compliant under one of two guidelines, A and B. Guideline B is applicable under specific conditions. Please see detailed guidelines in the Computer MOU Version 3.0. Power consumption is based on size of power supply.

    Criteria for ENERGY STAR-Compliant Integrated Computer System
    Integrated Computer Model Ship Date Guideline Power Consumption (Watts in Sleep Mode)
    Before July 1, 2000
  • Shall enter a sleep mode within 30 minutes of inactivity
  • If shipped with network capability, shall sleep on networks and respond to wake events
  • < 45W
    On & After July 1, 2000
  • Shall enter a sleep mode within 30 minutes of inactivity
  • If shipped with network capability, shall sleep on networks and respond to wake events
  • < 35W

    Criteria for ENERGY STAR-Compliant Monitors
    Low-Power Mode First Low-Power "Sleep Mode" Second Low-Power "Deep Sleep" Mode
    Maximum Watts in Low-Power State < 15 Watts < 8 Watts
    Power Management Preset Default Times 30 Minutes < 60 Minutes1
    1The combined total of the default times for both low-power modes shall not exceed 60 minutes.

    Computers: A desktop, tower or mini-tower, or portable unit, including high-end desktop computers, personal computers, workstations, network computer desktops, X terminal controllers, and computer-based point-of-sale retail terminals. To qualify, the unit must be capable of being powered from a wall outlet, but this does not preclude units that are capable of being powered from a wall outlet and also from a battery. This definition is intended primarily to cover computers sold for use in businesses or homes. This definition of a computer does not include computers sold or otherwise marketed as "File Server" or "Server."

    Monitors: A cathode-ray tube (CRT), flat panel display (e.g., a liquid crystal display) or other display device and its associated electronics. A monitor may be sold separately or integrated into the computer chassis. This definition is intended primarily to cover standard monitors designed for use with personal computers. The following may also be considered a monitor: mainframe terminals, and physically separate display units.

    Integrated Computer System: Systems in which the computer and visual display monitor are combined into a single unit. Such systems must meet all of the following criteria: it is not possible to measure the power consumption of the two components separately; and the system is connected to the wall outlet through a single power cable.

    Enable: To set the power management feature of a given product such that the power saving features are automatically activated as specified in the product's ENERGY STAR Memorandum of Understanding (MOU) with the manufacturer.

    Computer’s Low-Power or “Sleep” Mode: The reduced power state that the computer enters after a period of inactivity.

    Monitor’s First Low-Power or “Sleep” Mode: The reduced power state that the monitor enters after receiving instructions from a computer or via other functions. A blank screen and reduction in power consumption characterize this mode. The monitor returns to full-power mode upon sensing a request from a user.

    Monitor’s Second Low-Power or “Deep Sleep” Mode: The second reduced power state that the monitor enters after receiving instructions from a computer or via other functions. A significant reduction in power consumption characterizes this mode. The monitor returns to full- power mode upon sensing a request from a user.

    Wake Event: A user, programmed, or external event or stimulus that causes the computer to transition from its low-power or sleep mode to its active mode of operation. Examples of wake events include, but are not limited to, movement of the mouse, keyboard activity or a button press on the chassis, and in the case of external events, stimulus conveyed via a telephone, remote control, network, cable modem, satellite, etc.

    Additional Guidelines: Power management features must be activated before shipping with initial preset default times.

    Computers must include one or more mechanisms to power-down an ENERGY STAR-compliant monitor.

    Computers must be able to "sleep" in any operating system pre-installed before shipping, unless clearly stated in product literature.

    If the computer is shipped with the capability to be on a network, it shall retain in sleep mode its ability to respond to wake events directed or targeted to the computer while on a network. If the wake event requires the computer to exit the sleep mode and perform a task, the computer shall re-enter its sleep mode after a period of inactivity following the completion of the task requested.

    Procurement Language


    In considering the purchase of ENERGY STAR-compliant office equipment, you may have questions about changing procurement language for possible upcoming contracts. The following sample procurement language is intended for your reference and use. As with all purchases, be sure to ask the appropriate questions to assure that you are getting exactly what you want.
    (Also available in .pdf)

    The Vendor Must:

    • Provide ENERGY STAR-compliant computers that are configured so that they automatically enter a low-power mode after a period of inactivity. A computer whose power supply has a maximum continuous output power rating less than or equal to 200 Watts (< 200W) shall automatically enter a low-power "sleep" mode of 30 Watts or less within 30 minutes of inactivity. A computer whose power supply has a maximum continuous output power rating greater than 200 Watts (> 200W) shall automatically enter a low-power "sleep" mode of no more than 15 percent of its maximum continuous output power rating within 30 minutes. The maximum continuous output power rating of a power supply is the value certified by a Nationally Recognized Testing Laboratory (NRTL).

    • Provide computers in low-power mode that will automatically return to active mode upon resumption of system activity or receipt of external input (e.g., mouse movement, keyboard activity, typing of a password, modem interrupts, etc.). An initial keystroke by the user shall not be passed through to the open application. In other words, while the computer is in a low-power mode, the initial keystroke/mouse click shall reactivate the system and shall not have any effect on an open application. When a system awakens from a "sleep" mode, the user shall return automatically to the same situation that existed prior to activation of the sleep mode, i.e., all files and software packages in use at the time the sleep mode is triggered shall be returned to the screen in the same condition. If a security code or password is required, the computer shall return to its previous condition after the user enters the security code or password.

    • Ship computers with the power management feature enabled. To ensure that the maximum number of users take advantage of the low-power "sleep" mode, vendors shall ship their computers with the power-management feature enabled. The default time shall be preset for less than 30 minutes.

    • Provide computers that will include one or more mechanisms through which they can activate the low-power modes of an ENERGY STAR-compliant monitor. The manner in which a computer can control ENERGY STAR-compliant monitors, and any special circumstances that must exist in order for the monitor's power management to be accomplished, shall be clearly specified in product literature. The monitor control requirement does not apply to integrated computer systems. However, integrated computer systems that are marketed and sold as part of a docking system shall have the ability to automatically control the power of an externally connected monitor.

    • Provide ENERGY STAR-compliant computers that are capable of entering and fully recovering from the low-power “sleep” mode while running in at least one of the operating systems pre-installed before shipping. If an operating system that does not support power management is requested by the buyer, the vendor shall inform the buyer and suggest alternatives or options. If the computer is not shipped with operating system software, the vendor shall clearly specify which mechanism will render the computer ENERGY STAR compliant. In addition, if any special software, hardware drivers, or utilities are necessary for the proper activation and recovery of the sleep mode, they must be installed in the computer. Vendor shall include this information in product literature (e.g., user’s manual or data sheets) and/or on its Internet Web site.

    • Provide ENERGY STAR-compliant monitors that have the capability to automatically enter two successive low-power modes. In the first low-power "sleep" mode, the monitor shall consume 15 Watts or less within 30 minutes of inactivity. If the monitor continues to be idle for a total of 60 minutes, upon instructions from the CPU, it shall enter a second low-power "deep sleep" mode. An ENERGY STAR-compliant monitor in this second low-power mode shall consume 8 Watts of electricity or less. Monitors that have the capability to automatically proceed from active mode to a low-power mode of 8 Watts or less are assumed to comply. If any software is required to initiate a monitor's low-power modes, the software should be shipped with the monitor. The user shall have the ability to change the time settings or disable the low-power modes if needed. Upon resumption of user activity, the monitor shall automatically return to full operational capability.

    • For networked environments, provide computers that will sleep on networks and respond to wake events. If the computer is shipped with the capability to be on a network, it shall retain in sleep mode its ability to respond to wake events directed or targeted to the computer while on a network. If the wake event requires the computer to exit the sleep mode and perform a task, the computer shall reenter its sleep mode after a period of inactivity following the completion of the task requested.

    • Provide integrated computer systems, where the computer and the monitor are combined in a single unit, that will enter a low-power mode of no more than 45 Watts after a specified period of inactivity.

    For state and local governments making blanket purchases, include the provision that the vendors will:

    • Deliver new and repaired machines configured properly for automatic energy-saving features as per current US EPA ENERGY STAR specifications.

    • Provide customer support with respect to power management features such that these features remain properly enabled.
    Lease and maintenance agreements for office equipment shall include the following provisions concerning power management features:
    • Installation and service performed as part of the agreement shall include the proper configuration of power management features according to the terms of the ENERGY STAR Program MOU current for that class of equipment, at the time of the service. Personnel involved in system integration and service shall treat the malfunction of power management features as functional failures of the equipment, and shall diagnose and repair these problems rather than disabling the power management features.

    • If vendor representatives perform site customization and user training, these services shall be carried out so as to maximize the energy efficiency of the installed product. Vendor staff shall state the facts that power management features promote long equipment life, save energy and reduce the introduction of heat and fumes into the workplace.

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    Last Revision: Fri, Jan 21, 2000
    http://www.epa.gov/appdstar/purchasing/office_equipment/compcm.htm

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