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3.5 inch bare SATA hard drive silver metal top label visible

Western Digital

Western Digital WD2500AAKX 250GB 7200 RPM 16MB SATA 6.0Gb/s 3.5" internal hard drive

SKU CH-S77S-EW5Z9 MPN WD2500AAKX

250 GB desktop hard drive spinning at 7200 RPM with a 16 MB cache and SATA 6.0 Gb/s interface

  • Total capacity250 GB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory16 MB

Capacity 250GB

  • 7200 RPM spindle speed for responsive everyday computing
  • 250 GB capacity stores documents and media files
  • 16 MB cache buffers bursts for smoother operation
  • SATA 6.0 Gb/s interface connects to modern motherboards
  • 5 inch form factor fits standard desktop drive bays

What this drive is for

The Western Digital Blue WD2500AAKX is a 250GB 3.5" desktop hard drive built for everyday computing. It spins at 7200 RPM with a 16MB cache and connects through a SATA 6.0Gb/s interface. The bare-drive packaging suits system builders and upgraders who need straightforward storage for operating systems, applications and documents.

Thermals noise and power

The drive is engineered to run ultra cool and quiet, which supports long-term reliability in typical desktop workloads. Standard 3.5" dimensions of 147.00mm length, 101.60mm width and 25.40mm height fit regular drive bays without special cooling requirements. SATA power and data cables provide the necessary connections for normal operation.

Build fit and freedoms

A standard 3.5" drive bay and an available SATA 6.0Gb/s port on the motherboard or controller are all that is required for installation. The 250GB capacity adds primary or secondary storage without occupying an M.2 slot or PCIe lane, leaving those interfaces free for faster devices. The drive arrives erased to DoD 5220.22 M compliance and tested good, ready for partitioning and formatting in the new system.

How it compares

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

Price $49.99
Cheaper than about 78% of the 4,938 comparable items (median $107.99).
Total capacity 250 GB
Lower than about 90% of the 2,372 comparable items (median 2 TB).
Price per TB $199.96 per TB
Pricier than about 78% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameWestern Digital
Product lineBlue
Model nameWD2500AAKX
Total capacity250 GB
Recommended useFor Daily Computing
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 height25.4 mm
Maximum width101.6 mm
Maximum length147 mm
Shipping weight0.57 kg
Package size229 × 152 × 76 mm

Other versions of this model

2 more in the same range

Questions about this item

How do I install this 3.5" SATA 6.0Gb/s drive and what step is often missed?

Mount the drive using 3.5" bay screws, connect the SATA data cable to a 6.0Gb/s port and attach a SATA power connector; the step often missed is enabling the SATA controller in BIOS so the 250GB volume appears.

What maintenance or replacement will this 7200 RPM drive need later?

No scheduled maintenance is required; monitor SMART attributes for reallocated sectors and replace the drive if the count rises above the 25 bad-sector threshold noted during testing.

What limit appears first under sustained write loads on this 16MB cache drive?

The 16MB cache fills quickly during sustained writes, so the 7200 RPM mechanical throughput becomes the bottleneck before the SATA 6.0Gb/s interface saturates.

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