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Silver 3.5 inch SATA hard drive with exposed circuit board

Seagate

Seagate ST3500641AS-RK 500GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" internal hard drive

SKU CH-AXA4-Z1MBZ MPN ST3500641AS-RK

500 GB desktop hard drive with 7200 RPM speed and 16 MB cache over a SATA 6.0 Gb/s interface

  • Total capacity500 GB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeRetail Kit
  • Rotational speed7,200 RPM
  • Cache memory16 MB
  • 500 GB capacity stores large media libraries and backups
  • 7200 RPM spindle speed delivers quick file access for everyday tasks
  • 16 MB cache buffers bursts of read and write activity
  • SATA 6.0 Gb/s interface provides broad motherboard compatibility
  • 5 inch form factor fits standard desktop drive bays

Desktop storage with 500GB capacity

The Seagate BarraCuda 7200.9 ST3500641AS-RK is a 3.5 inch internal hard drive built for desktop computers. It provides 500GB of storage on a SATA 6.0Gb/s interface with a 7200 RPM spindle speed and 16MB cache. The drive measures 146.05mm long, 101.60mm wide and 22.23mm high. It is supplied in a retail kit and is new condition.

Suits desktop towers and basic NAS builds

This drive fits standard desktop performance towers, all-in-one PCs and consumer-grade NAS devices or desktop RAID arrays. Buyers needing higher capacities or faster solid-state speeds should consider other options. The 16MB cache and 7200 RPM rotation serve general desktop workloads and bulk storage requirements.

Sustained throughput on mechanical media

Under continuous load the 7200 RPM platters and 16MB cache deliver steady data rates across the SATA link. The fluid dynamic bearing motor keeps acoustic output low during extended read or write sessions. Mechanical latency and rotational speed define the sustained performance envelope rather than burst transfer figures.

How it compares

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

Price $47.99
Cheaper than about 79% 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 $95.98 per TB
Pricier than about 62% 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-RK
Total capacity500 GB
Performance
Rotational speed7,200 RPM
Storage
Cache memory16 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height22.23 mm
Maximum width101.6 mm
Maximum length146.05 mm
Shipping weight0.57 kg
Package size196 × 152 × 61 mm

Questions about this item

What SATA port speed does my motherboard need to support the ST3500641AS-RK at full 6.0Gb/s?

The drive uses a SATA 6.0Gb/s interface; it will operate at the port's maximum negotiated speed.

Will the BarraCuda 7200.9 run reliably with an older SATA 3Gb/s drive in the same system?

Yes, each device negotiates its own link speed independently on the SATA bus.

How can I verify the 7200 RPM motor and 16MB cache are active after installation?

Check the drive's reported RPM and cache size in BIOS or a tool such as CrystalDiskInfo.

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