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Silver 3.5 inch bare internal hard drive with circuit board visible

Seagate

Seagate ST33000651AS 3TB 7200 RPM 64MB SATA 6.0Gb/s 3.5" internal hard drive

SKU CH-0RYM-6PDXF MPN ST33000651AS

A 3TB 7200 RPM SATA 6.0Gb/s 3.5-inch desktop hard drive with 64MB cache for high-capacity storage

  • Total capacity3 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Flash memory typeDesktop
  • Rotational speed7,200 RPM
  • 3 TB capacity stores large media libraries
  • 7200 RPM spindle delivers fast sequential throughput
  • 64 MB cache reduces burst-transfer bottlenecks
  • SATA 6.0 Gb/s interface matches modern controllers
  • Free Disc Wizard software bypasses 2.1 TB legacy limit

Capacity and server focus

The Seagate BarraCuda XT ST33000651AS is a 3TB desktop internal hard drive built for server and high-capacity desktop workloads. Its 7200 RPM spindle speed and 64MB cache target systems that need sustained throughput for large data sets. The 3.5-inch form factor fits standard drive bays in towers and rackmount chassis.

3TB headroom and legacy limits

Three terabytes provides ample space for media libraries, backup archives and entry-level server storage pools. The drive includes Disc Wizard software to bypass the 2.1TB addressing ceiling found in older BIOS environments without extra hardware. Workloads that demand faster random access or multi-drive redundancy will reach the mechanical limits of a single spinning disk.

SATA 6.0Gb/s interface constraints

The SATA 6.0Gb/s link caps maximum sequential transfer at the interface ceiling, while average seek sits at 8.5ms and average write at 9.5ms with 4.16ms latency. Burst performance benefits from the 64MB cache, yet sustained rates remain bound by the mechanical platter speed. Systems requiring lower latency or higher IOPS must look beyond the SATA hard-drive class.

How it compares

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

Price $287.99
Pricier than about 81% of the 4,938 comparable items (median $107.99).
Total capacity 3 TB
Higher than about 60% of the 2,372 comparable items (median 2 TB).
Price per TB $96.00 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 XT
Model nameST33000651AS
Total capacity3 TB
Recommended useIdeal for Servers
Performance
Rotational speed7,200 RPM
Average seek time8.5 ms
Mean write time9.5 ms
Mean latency4.16 ms
Storage
Flash memory typeDesktop
Cache memory64 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight0.68 kg
Package size146 × 102 × 25 mm

Questions about this item

Will the 3TB capacity work with my older motherboard that only supports drives up to 2.1TB?

Yes, the included Disc Wizard software allows the full 3TB to be configured on systems with legacy 2.1TB BIOS limits without extra hardware.

How can I verify the drive is performing correctly after installation?

Check that the drive reports 7200 RPM and a 6.0Gb/s SATA link speed in your BIOS or OS utilities; typical seek time is 8.5ms and average latency is 4.16ms.

Does the bare drive package include mounting screws or a SATA cable, or must I buy them separately?

The bare drive ships without screws, cables, or brackets; you will need to supply a SATA data cable, a SATA power connector, and 3.5" mounting hardware.

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