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Seagate BarraCuda 3.5 inch SATA hard drive bare silver aluminium casing label ST3320418AS

Seagate

Seagate BarraCuda 7200.12 ST3320418AS 320GB 7200 RPM 16MB SATA 3.0Gb/s 3.5" internal hard drive

SKU CH-J9PD-YQ1C8 MPN ST3320418AS

320 GB 3.5" desktop hard drive with 7200 RPM, 16 MB cache and SATA 3.0 Gb/s interface

  • PackagingBare Drive
  • Capacity320GB
  • RPM7200 RPM
  • InterfaceSATA 3.0Gb/s
  • Cache16MB
  • Average Latency4.16ms

Options 320GB

  • 320 GB capacity stores large file collections
  • 7200 RPM spindle speed delivers quick data access
  • 16 MB cache buffers bursts for smoother throughput
  • SATA 3.0 Gb/s interface connects to standard desktop ports
  • Perpendicular recording technology enables reliable high-density storage

Capacity and interface

This 320GB desktop hard drive uses a SATA 3.0Gb/s connection and spins at 7200 RPM with a 16MB cache. It is built for standard 3.5-inch drive bays in desktop PCs and servers that accept SATA drives.

SATA 3.0Gb/s practical limits

The SATA 3.0Gb/s interface caps theoretical throughput at 3.0 gigabits per second. Real-world transfer rates will be lower and depend on the host controller, cable quality and system load. Average latency is 4.16ms.

Compatibility checklist

Verify your motherboard or controller has a free SATA port and that your power supply provides a SATA power connector. Ensure the chassis has a 3.5-inch mounting bay with adequate clearance. This bare drive ships without cables, brackets or formatting.

Highlights

  • 320 GB capacity stores large file collections
  • 7200 RPM spindle speed delivers quick data access
  • 16 MB cache buffers bursts for smoother throughput
  • SATA 3.0 Gb/s interface connects to standard desktop ports
  • Perpendicular recording technology enables reliable high-density storage

Specifications

BrandSeagate
SeriesBarraCuda 7200.12
ModelST3320418AS
PackagingBare Drive
Capacity320GB
RPM7200 RPM
InterfaceSATA 3.0Gb/s
Cache16MB
Average Latency4.16ms
Form Factor3.5"
FeaturesShips with the most reliable and proven perpendicular magnetic recording technology
Sustainable technology for a green world:
Typically 70 percent or more of the materials used to build the drive is recycled.
Complies with the RoHS directive and several non-regulatory restrictions
Shipping weight0.41 kg
Package size152 × 114 × 25 mm

Other versions of this model

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Questions about this item

Should I pick the 320 GB version or a larger BarraCuda 7200.12 drive?

This listing is for the 320 GB model only. If you need more space, choose a higher-capacity BarraCuda 7200.12 drive instead.

What does the 7200 RPM speed actually deliver in a desktop PC?

The 7200 RPM spindle gives an average latency of 4.16 ms, so the drive responds quickly for everyday desktop workloads.

The drive uses SATA 3.0 Gb/s — what does that limit in practice?

The SATA 3.0 Gb/s interface caps the maximum transfer rate at 3.0 Gb/s, which is the ceiling for sequential reads and writes on this drive.

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