For more sizes check out the entire Western Digital Caviar Green Range

Desktop Hard Drives
WD Caviar Green
Cool, Quiet, Eco-friendly.
SATA 6 Gb/s, SATA 3 Gb/s
320 GB - 3 TB
Massive capacity.
WD leads the way; pioneering capacity to deliver a massive 3 TBs of storage on a single drive.
Reduced power consumption.
Reduced power consumption makes it possible to build systems with higher capacities and the right balance of system performance, ensured reliability, and energy conservation.
Cool and quiet.
WD GreenPower Technology yields lower operating temperatures for increased reliability and low acoustics perfect for ultra-quiet PCs and external drives.
Did you know...
It's easy to install an internal hard drive in your computer.
The world's largest capacity internal hard drive.
WD Caviar Green SATA drives now deliver up to a massive 3 TB's of storage on a single drive.
WD meets the technological challenges of implementing 3 TB SATA hard drives.
SATA hard drives are now capable of storing up to 3 TB of data on a single hard drive. WD is leading the way in the industry, providing you with solutions for implementing 2.19 TB and larger drives. Learn more
Perfect for external drives.
External drive manufacturers can eliminate the need for a fan in a high-capacity product by utilizing the cool and quiet operation of WDCaviar Green hard drives.
Calculates optimum seek speeds to lower power consumption, noise and vibration. View demo
A fine-tuned balance of spin speed, transfer rate and caching algorithms designed to deliver both significant power savings and solid performance. Additionally, WD Caviar Green drives consume less current during startup allowing lower peak loads on systems as they are booted.
NoTouch ramp load technology.
The recording head never touches the disk media ensuring significantly less wear to the recording head and media as well as better drive protection in transit.
Advanced Format (AF).
Technology being adopted by WD and other drive manufacturers as one of multiple ways to continue growing hard drive capacities. AF is a more efficient media format that enables increased areal densities. (WDxxEZRSDTL, WDxxEARS and WDxxxxAARS models only)
Ideal for:
PCs, external storage and other devices that require lower power consumption and cool, quiet operation.
Desktop / Consumer RAID Environments - WD Caviar Green Hard Drives are tested and recommended for use in consumer-type RAID applications. (RAID-0 / RAID-1)
Business Critical RAID Environments WD Caviar Green Hard Drives are not recommended for and are not warranted for use in RAID environments utilizing Enterprise HBAs and/or expanders and in multi-bay chassis, as they are not designed for, nor tested in, these specific types of RAID applications. For all Business Critical RAID applications, please consider WD's Enterprise Hard Drives that are specifically designed with RAID-specific, time-limited error recovery (TLER), are tested extensively in 24x7 RAID applications, and include features like enhanced RAFF technology and thermal extended burn-in testing.
Large Capacity Drives
Meeting the technological challenges of 3 TB SATA hard drive implementation.

WD leads the way now offering a massive 3 TBs of storage capacity on a single drive. In a typical PC configuration, a drive may be connected as a primary boot drive, or as a secondary drive. Large capacity drives are no different, however, it is important to verify your system can support a large capacity drive before attempting to install it.

When installed as a boot drive, put simply, the operating system boots off of the drive, (an operating system is required to start the computer). When installed as a secondary drive will solely be used to house data, (the drive will not contain an operating system). While newer systems are set up to handle large capacity drives, older legacy systems require updating and still may not support booting of older operating systems.

To understand if your system will support a hard drive with greater than 2.19 TB, consult your OS, Motherboard and USB bridge device solution providers from the list below before you attempt to install in your system.
Motherboard Partners
WD has partnered with motherboard and system solution providers that now offer system solutions supporting Large Drives. Please consult the solution provider for their solution availability and solution requirements. Refer to links below for details.

  • ASUS
  • MSI
  • External Applications

    USB bridge devices

    USB attached storage solution providers have solved many of the issues associated with Large Drives within the USB Bridge firmware. Some present large capacity drives as single drive using larger sector sizes while others present the large capacity drive as more than one or more smaller drives to the host. Please consult the solution provider for their solution availability and implementation details.

  • ASMedia Technology
  • Freescale Semiconductor
  • Fujitsu
  • Initio Corporation
  • JMicron Technology
  • Lucidport Technology
  • Silicon Image
  • Sunplus Technology
  • PLX Technology/Oxford Semiconductor
  • Skymedi Corporation
  • Symwave
  • Texas Instruments
  • VIA Technologies
    Compatibility you can count on - now and in future.
    WD is leading the way with a full lineup of SATA 6 Gb/s drives.
    Over the years the industry has increased bus bandwidth from PATA through SATA 1.5 Gb/s and SATA 3 Gb/s to keep up with the demand for higher transfer rates. The next evolution of bus bandwidth has now been achieved with the introduction of SATA 6 Gb/s, (SATA 3.0). We've added a SATA 6 Gb/s interface to our award-winning WD Caviar Blue, Green, and Black desktop hard drives in capacities from 250 GB - 3 TB. This transition to a SATA 6 Gb/s interface aligns with the introduction of SATA 6 Gb/s-supporting chip sets and motherboards coming to the market.

    Why should I buy a SATA 6 Gb/s hard drive from WD?

    Buying a SATA 6 Gb/s drive now is a great way to make sure your hard drive will be compatible with next generation motherboards and chipsets.

    And when you buy from WD, the world's leading hard drive supplier by volume, you gain comfort in knowing that the drive has been extensively tested for reliability and compatibility and will be supported by world-class technical support.

    Will SATA 6 Gb/s drives work with older systems?

    Yes, the SATA 6 Gb/s interface uses the same connector as SATA 3 Gb/s and is compatible with Microsoft Windows 7/Vista/XP/2000 and Mac OS X.
    WD Caviar Green 2 TB SATA Hard Drives ( WD20EARX)

    Performance Specifications  
      Rotational Speed IntelliPower *
      Buffer Size 64 MB
    Transfer Rates
      Buffer To Host (Serial ATA) 6 Gb/s (Max)
    Physical Specifications  
      Formatted Capacity 2,000,398 MB
      Capacity 2 TB
      Interface SATA 6 Gb/s
      User Sectors Per Drive 3,907,029,168
    Physical Dimensions  
      Height 1.028 Inches
      Depth 5.787 Inches
      Width 4.00 Inches
      Weight 1.61 Pounds
      Height 26.1 mm
      Depth 147 mm
      Width 101.6 mm
      Weight 0.73 kg
    Environmental Specifications  
      Operating Shock (Read) 65G, 2 ms
      Non-operating Shock 250G, 2 ms
      Idle Mode 24 dBA (average)
      Seek Mode 0 29 dBA (average)
      Seek Mode 3 25 dBA (average)
    Temperature (English)
      Operating 32 F to 140 F
      Non-operating -40 F to 158 F
    Temperature (Metric)
      Operating -0 C to 60 C
      Non-operating -40 C to 70 C
    Electrical Specifications  
    Current Requirements
      12 VDC
      Read/Write 296 mA
      Idle 243 mA
      Standby 3 mA
      Sleep 3 mA
      5 VDC
      Read/Write 503 mA
      Idle 172 mA
      Standby 160 mA
      Sleep 160 mA
      Power Dissipation
      Read/Write 6.00 Watts
      Idle 3.70 Watts
      Standby 0.80 Watts
      Sleep 0.80 Watts
    As used for storage capacity, one megabyte (MB) = one million bytes, one gigabyte (GB) = one billion bytes, and one terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment. As used for buffer or cache, one megabyte (MB) = 1,048,576 bytes. As used for transfer rate or interface, megabyte per second (MB/s) = one million bytes per second, megabit per second (Mb/s) = one million bits per second, and gigabit per second (Gb/s) = one billion bits per second.

    No additional files, specification sheets, guides or documentation found for product.

    Warranty: 2 Years Warranty

    Full manufacturers warranty details are available at the manufacturers (Western Digital) web site.

    Unless otherwise specified Techbuy is normally your first point of contact for warranty related returns, further information regarding our warranty policies and consumer guarantees is available on our policies and service & support pages.

    To apply for return of a product just go to our returns page.

    These terms are in addition to and do not affect any terms, conditions, guarantees and warranties implied by law.

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