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Western Digital > 
Item#: 9SIA4MR4ME3091

Western Digital WD Green WD6400AACS 640GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive

Ships from United States. Most customers receive within 4-10 days.

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  • 7200 RPM 16MB Cache
  • SATA 3.0Gb/s
  • 2 years limited

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

The Western Digital Caviar Green 640GB Hard Drive uses less power and support quieter, cooler-running desktop PCs. Its breakthrough 16 MB cache makes this hard drive suitable for high-performance home and business computing, as it can handle high-end data-intensive and multimedia applications.

This hard drive incorporates WD’s GreenPower technology, which yields lower operating temperatures and low acoustics, best for ultra-quiet PCs and external drives use. The IntelliPower delivers a fine-tuned balance of spin speed, transfer rate and caching algorithms; IntelliSeek Calculates optimum seek speeds; and IntelliPark automatically unload the heads during idle. All the features help the drive to operation in lower power consumption and reduced noise environment.

  • newegg GreenPower Technology With GreenPower technology, the Western Digital Caviar Green WD6400AACS yields lower operating temperatures for increased reliability and low acoustics for ultra-quiet PCs and external drives.
  • newegg Reduced Power Consumption Combined with WD's IntelliSeek, IntelliPark, and IntelliPower technologies, the Western Digital Caviar Green WD6400AACS has reduced power consumption by up to 40 percent compared to standard desktop drives
  • newegg SATA 3.0 Gb/s Interface The Western Digital Caviar Green WD6400AACS features the SATA II interface supporting up to 3.0 Gb/s data transfer rates, Native Command Queuing (NCQ) and hot-pluggable point-to-point connections for optimum performance, efficiency, convenience and flexibility.
  • newegg Perpendicular Magnetic Recording Perpendicular Magnetic recording technology enables industry-leading capacity in existing standard form factors and improves performance by increasing data density while reducing moving parts for enhanced reliability.

Learn more about the Western Digital WD6400AACS

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years
  • Read full details
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