We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Silver 2.5 inch bare laptop hard drive with circuit board visible

Seagate

Seagate Momentus 7200.4 ST9320423AS 320GB 7200 RPM 16MB Cache SATA 3.0Gb/s 2.5" laptop hard drive

SKU CH-VH5P-SEG8Y MPN ST9320423AS

2.5-inch 320 GB laptop drive spins at 7200 RPM with 16 MB cache and SATA 3.0 Gb/s interface

  • Total capacity320 GB
  • Interface typeSATA 3.0Gb/s
  • Form factor2.5 in (6.35 cm)
  • Packaging typeBare Drive
  • Cache memory16 MB
  • Mean latency4.17 ms
  • 7200 RPM spindle speed accelerates data access for faster boot and application load times
  • 16 MB cache buffers frequent reads and writes to improve everyday responsiveness
  • SATA 3.0 Gb/s interface provides broad compatibility with 2.5 inch laptop drive bays
  • 320 GB capacity stores documents, media and applications in a single drive
  • G-Force Protection technology parks heads on impact to help safeguard data during drops

320 GB SATA laptop drive

The Seagate Momentus 7200.4 ST9320423AS is a 2.5 inch internal hard drive built for notebooks and compatible 2.5 inch bays. It offers 320 GB of storage on a SATA 3.0Gb/s interface. The 7200 RPM spindle speed and 16 MB cache suit users who want faster load times than a 5400 RPM drive provides.

G-Force Protection and quiet motor

G-Force Protection technology parks the heads during sudden motion to help safeguard data if the laptop is dropped. A fluid dynamic bearing motor reduces acoustic output for quieter operation in thin-and-light chassis. The bare-drive package contains only the drive itself without cables, brackets or installation software.

9.5 mm height constraint

The drive measures 9.5 mm tall, 69.75 mm wide and 100.3 mm long, so it fits standard 9.5 mm drive bays but not ultra-thin 7 mm slots. Average latency is 4.17 ms at 7200 RPM. Buyers needing a thinner profile or a higher-capacity single drive should verify their bay height before ordering.

How it compares

Measured against everything we stock in 2.5-Inch Internal Laptop HDDs, at today’s prices. Recalculated every night.

Price $111.99
Pricier than about 70% of the 645 comparable items (median $66.99).
Total capacity 320 GB
Typical for this category: the median of 419 items is 320 GB.
Price per TB $349.97 per TB
Pricier than about 66% of the 416 comparable items (median $233.48 per TB).

New to this? Paying with USDT: TRC-20 or ERC-20 — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameSeagate
Product lineMomentus 7200.4
Model nameST9320423AS
Total capacity320 GB
Performance
Mean latency4.17 ms
Rotational speed7,200 RPM
Storage
Cache memory16 MB
Ports & slots
Interface typeSATA 3.0Gb/s
Size & build
Form factor2.5 in (6.35 cm)
Max height9.5 mm
Maximum width69.75 mm
Maximum length100.3 mm
Shipping weight0.13 kg
Package size152 × 97 × 25 mm

Questions about this item

Does the 7200 RPM motor or the 16MB cache require any periodic maintenance or replacement?

No, the 7200 RPM fluid dynamic bearing motor and 16MB cache are sealed inside the drive and need no user maintenance or replacement.

Which limit appears first during sustained transfers — the SATA 3.0Gb/s interface or the 7200 RPM platter speed?

The 7200 RPM platter speed limits sustained throughput before the SATA 3.0Gb/s interface saturates.

How much noise and heat does the 2.5-inch 7200.4 drive produce when running all day?

The fluid dynamic bearing motor keeps noise low, and power draw stays near 5400 RPM-equivalent levels for cool, quiet all-day operation.

More in 2.5-Inch Internal Laptop HDDs

Similar items