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Silver 3.5 inch bare SATA hard drive with exposed circuit board

Seagate

Seagate ST3500641AS 500GB 7200 RPM 16MB SATA 3.0Gb/s 3.5" internal hard drive

SKU CH-57AG-35NJ2 MPN ST3500641AS

A 500 GB 3.5" desktop hard drive spinning at 7200 RPM with 16 MB cache and a SATA 3.0Gb/s interface

  • Total capacity500 GB
  • Interface typeSATA 3.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory16 MB
  • 500 GB capacity stores large media libraries
  • 7200 RPM spindle speed delivers quick data access
  • 16 MB cache buffers frequent read requests
  • SATA 3.0 Gb/s interface connects to standard desktop ports
  • 2 ms average seek reduces file retrieval delay

Capacity and interface

This 500GB desktop hard drive uses a SATA 3.0Gb/s interface and spins at 7200 RPM with a 16MB cache. It suits builders adding bulk storage to a desktop PC or replacing an older mechanical drive. The 3.5-inch form factor fits standard drive bays. It is not for users who need solid-state speed or a smaller 2.5-inch form factor for laptops.

Sustained workload behaviour

The drive delivers an average seek time of 8.2ms and average latency of 4.16ms during continuous read and write operations. Native command queuing helps order requests efficiently when the drive handles multiple simultaneous tasks. Write performance averages 9ms. It is not for workloads demanding the low latency and high IOPS of flash storage.

Thermals noise and power

The manufacturer highlights whisper-quiet acoustics and a rugged, efficient system design for normal desktop use. Best-in-class operating and non-operating shock resistance supports reliability during daily operation. The bare-drive packaging means no retail accessories are included. It is not for silent builds that require fanless or solid-state components.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $88.99
Cheaper than about 56% of the 4,938 comparable items (median $107.99).
Total capacity 500 GB
Lower than about 80% of the 2,372 comparable items (median 2 TB).
Price per TB $177.98 per TB
Pricier than about 76% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineBarraCuda 7200.9
Model nameST3500641AS
Total capacity500 GB
Performance
Rotational speed7,200 RPM
Average seek time8.2 ms
Mean write time9 ms
Mean latency4.16 ms
Storage
Cache memory16 MB
Ports & slots
Interface typeSATA 3.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight0.45 kg
Package size152 × 102 × 41 mm

Questions about this item

How loud and hot does the ST3500641AS run during continuous 7200 RPM operation?

The 7200 RPM spindle and 16 MB cache are designed for whisper-quiet acoustics and rugged, efficient system design, keeping noise and heat low even under sustained load.

Which SATA host interface and power connector must my desktop already provide for this bare drive?

A SATA 3.0 Gb/s data port and a standard 15-pin SATA power connector are required; the drive ships without cables or brackets.

Will the 500 GB BarraCuda 7200.9 work reliably alongside an older SATA 1.5 Gb/s controller?

Yes, the SATA 3.0 Gb/s interface is backward compatible with 1.5 Gb/s hosts, and native command queuing helps maintain performance on legacy chipsets.

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