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Silver 3.5 inch desktop hard drive with SATA connectors

Western Digital

Western Digital Blue WD6400AAKS 640GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5

SKU CH-4M9N-1AH28 MPN WD6400AAKS

3.5-inch 640 GB desktop drive spinning at 7200 RPM with 16 MB cache and SATA 3.0 Gb/s interface

  • Interface typeSATA 3.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Cache memory16 MB
  • Rotational speed7,200 RPM
  • 7200 RPM spindle speed accelerates data access
  • 16 MB cache buffers frequent reads and writes
  • SATA 3.0 Gb/s interface delivers up to 3.0 Gb/s transfer rates
  • 640 GB capacity stores operating system and files
  • 5 inch form factor fits standard desktop drive bays

640 GB 3.5" SATA desktop drive

The Western Digital Blue WD6400AAKS is a 3.5-inch internal hard drive with a 640 GB capacity. It spins at 7200 RPM and provides a 16 MB cache over a SATA 3.0 Gb/s interface. The drive is supplied new and suits desktop PCs or compatible enclosures.

Check SATA port and 3.5" bay

Verify that your motherboard or controller has a free SATA port and that the chassis offers a 3.5-inch drive bay with mounting points. Confirm the power supply includes a SATA power connector for the drive. No adapter is needed when both connections are present.

Suits storage upgrades and replacements

This drive fits users adding bulk storage to a desktop or replacing an older mechanical disk. It is not for systems that only accept 2.5-inch drives or M.2 modules. Builders needing faster access speeds or a laptop form factor should consider other options.

How it compares

Measured against everything we stock in 2.5-Inch Internal Laptop HDDs, at today’s prices. Recalculated every night.

Price $62.99
Typical for this category: the median of 645 items is $66.99.

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Specifications

Product
Brand nameWestern Digital
Product lineBlue
Model nameWD6400AAKS
Performance
Rotational speed7,200 RPM
Storage
Cache memory16 MB
Ports & slots
Interface typeSATA 3.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight1.36 kg
Package size152 × 103 × 30 mm

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