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Silver 3.5 inch SATA hard drive bare drive with circuit board visible

Seagate

Seagate BarraCuda 7200.10 ST3320620AS 320GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" internal hard drive

SKU CH-7QPJ-C61RG MPN ST3320620AS

A 320 GB 3.5-inch desktop hard drive spinning at 7200 RPM with a 16 MB cache and a SATA 3.0 Gb/s interface

  • Total capacity320 GB
  • Interface typeSATA 3.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory16 MB
  • 320 GB capacity stores large media libraries and backups
  • 7200 RPM spindle speed and 16 MB cache accelerate everyday workloads
  • SATA 3.0 Gb/s interface provides up to 3.0 Gb/s transfer rates
  • Perpendicular recording technology increases data density for reliable long-term storage
  • SoftSonic motor and Enhanced G-Force Protection deliver quiet, durable operation

Capacity and interface

The Seagate BarraCuda 7200.10 ST3320620AS is a 320GB 3.5-inch desktop internal hard drive. It spins at 7200 RPM with a 16MB cache and connects through a SATA 3.0Gb/s interface. Perpendicular recording technology increases data density while reducing moving parts for enhanced reliability.

Compatibility check

Verify that your motherboard or controller provides a free SATA 3.0Gb/s port and that the power supply includes a SATA power connector. The 3.5-inch form factor requires a standard drive bay or mounting bracket inside the chassis. Ensure the operating system can recognise a 320GB drive without additional drivers.

Build and daily use

The bare drive ships without cables, brackets or retail packaging, so installers must supply their own SATA data and power cables. SoftSonic motor technology keeps acoustic output low during routine operation. Enhanced G-Force Protection helps defend the mechanism against shock from handling or vibration while the system is running.

How it compares

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

Price $43.99
Cheaper than about 83% of the 4,938 comparable items (median $107.99).
Total capacity 320 GB
Lower than about 87% of the 2,372 comparable items (median 2 TB).
Price per TB $137.47 per TB
Pricier than about 70% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineBarraCuda 7200.1
Model nameST3320620AS
Total capacity320 GB
Performance
Rotational speed7,200 RPM
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 weight0.58 kg
Package size229 × 152 × 76 mm

Questions about this item

Does the bare drive ST3320620AS include cables or mounting brackets, or must they be purchased separately?

The ST3320620AS is supplied as a bare drive only. No SATA data cable, power cable or mounting screws are included; these must be sourced separately for installation.

The 7200.10 series lists several capacities; why choose the 320 GB model over larger or smaller options?

The 320 GB capacity matches the ST3320620AS part number and pairs a 7200 RPM spindle with 16 MB cache, giving a balanced cost-per-gigabyte for typical desktop workloads.

How does the 3.0 Gb/s SATA link translate into real-world throughput inside a desktop PC?

The 3.0 Gb/s interface supports burst transfers up to that rate; sustained read/write speeds are governed by the 7200 RPM platters and 4.16 ms average latency, typically delivering well below the link maximum.

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