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Silver rectangular 2.5 inch bare SATA hard drive with green circuit board visible

Seagate

Seagate ST9640320AS 640GB 5400 RPM 8MB Cache SATA 3.0Gb/s 2.5" laptop hard drive

SKU CH-1965-3W1DV MPN ST9640320AS

A 2.5-inch laptop hard drive with 640GB capacity, 5400 RPM speed and 8MB cache over a SATA 3.0Gb/s interface

  • PackagingBare Drive
  • InterfaceSATA 3.0Gb/s
  • Capacity640GB
  • Cache8MB
  • Average Seek Time11ms
  • Average Latency5.5ms
  • 640 GB capacity stores large media libraries
  • 5400 RPM spindle speed balances performance and power draw
  • 8 MB cache accelerates frequent file access
  • SATA 3.0 Gb/s interface enables fast data transfer
  • 5 inch form factor fits standard laptop bays

Capacity and interface

This is a new Seagate Momentus 5400 laptop internal hard drive with 640GB capacity and a SATA 3.0Gb/s interface. The 2.5 inch form factor fits standard notebook bays and the bare-drive packaging means no cables or brackets are included.

Suitable upgrades and limits

The drive suits owners of older laptops that accept a 5400 RPM SATA drive and want more space for documents, music or video files. Buyers who require a solid-state drive or a higher spindle speed should consider other options.

Deciding specification

The single specification that decides fit is the SATA 3.0Gb/s interface combined with the 2.5 inch form factor; the host system must provide a matching SATA data and power connection.

Points forts

  • 640 GB capacity stores large media libraries
  • 5400 RPM spindle speed balances performance and power draw
  • 8 MB cache accelerates frequent file access
  • SATA 3.0 Gb/s interface enables fast data transfer
  • 5 inch form factor fits standard laptop bays

Caractéristiques

BrandSeagate
SeriesMomentus 5400
ModelST9640320AS
PackagingBare Drive
InterfaceSATA 3.0Gb/s
Capacity640GB
Cache8MB
Average Seek Time11ms
Average Latency5.5ms
RPM5400 RPM
Form Factor2.5"
Poids d’expédition0.09 kg
Dimensions du colis102 × 76 × 11 mm

Questions sur cet article

What practical throughput does the SATA 3.0Gb/s interface cap at?

The SATA 3.0Gb/s interface caps at a theoretical 3.0 Gb/s internal data rate, with actual throughput limited by the 5400 RPM spindle and 8MB cache.

What physical space and mounting does the 2.5" form factor need?

The 2.5" form factor fits standard laptop drive bays and caddies using the industry-standard SATA connector and mounting holes.

How is the drive installed, and what step is often missed?

Connect the SATA data and power cables, secure the drive in the bay, then initialise and format the 640GB volume in the operating system before use.

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