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669900379243
Seagate ST500LX003 Momentus XT 500GB 7200RPM SATA 6Gb/s 32MB Cache 2.5-Inch Hard Drive
669900379243

Seagate ST500LX003 Momentus XT 500GB 7200RPM SATA 6Gb/s 32MB Cache 2.5-Inch Hard Drive

4.6(200 ratings)

Best price now

$18.95at eBayChecked 7 h ago

86% under what the other stores charge

Compared across 6 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission.

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Price facts

  • Lowest price today: $18.95 at eBay (checked Nov 13, 2026).
  • Checked at 6 stores.

Our take on the Seagate ST500LX003 Momentus XT 500GB 7200RPM SATA 6Gb/s 32MB Cache 2.5-Inch Hard Drive

The Seagate Momentus XT is a 2.5-inch solid state hybrid drive: a 7200 RPM 500GB hard disk with 32MB of cache and a small flash layer that caches frequently used data. It was built as a drop-in upgrade for laptops and game consoles that take a 9.5mm 2.5-inch drive, giving faster boots and app launches than a plain 7200 RPM drive without the capacity cost of an SSD. Its interface is SATA II at 3Gb/s, so it will not saturate a SATA III port. Against a same-era SSD it is slower and more fragile; against a plain hard drive it feels quicker once the cache warms up.

Best forLaptop owners with an older 2.5-inch bay who want more speed than a plain hard dReviving a 2008-2012 laptop or desktop on a budgetGame console or small-form-factor builds that need a 9.5mm driveSecondary storage where capacity matters more than peak speed
Pros
  • Hybrid flash cache speeds up repeat reads, boots and app launches
  • 500GB capacity at 7200 RPM with 32MB cache
  • Standard 2.5-inch, 9.5mm height fits most laptop bays
  • SATA interface works with SATA II and SATA III ports
  • Cheaper per gigabyte than an SSD of the same era
Cons
  • SATA II 3Gb/s link caps throughput below modern SATA III drives
  • Speed gains depend on the cache learning your habits; first runs are hard-drive slow
  • Mechanical platters and heads are vulnerable to shock and drops
  • Slower and louder than an SSD
  • Old model; firmware and support are dated

Seagate ST500LX003 Momentus XT 500GB 7200RPM SATA 6Gb/s 32MB Cache 2.5-Inch Hard Drive prices at every store

  • serverdiskdrives.comNew

    In stock

    $125.00Free shippingChecked 7 h ago
    Visit serverdiskdrives.com
  • The Best PartNew

    In stock

    $206.50Free shippingChecked 7 h ago
    Visit The Best Part
  • eBayNew

    Availability unknownSold by effectelec

    $18.95Checked 7 h ago
    Visit eBay
  • CPU MedicsNew

    Availability unknown

    $59.00Checked 7 h ago
    Visit CPU Medics
  • ctspoint.comNew

    Availability unknown

    $136.28Checked 7 h ago
    Visit ctspoint.com
  • Tech AtlantixNew

    Availability unknown

    $143.07Checked 7 h ago
    Visit Tech Atlantix

Store links may earn us a commission.

Seagate ST500LX003 Momentus XT 500GB 7200RPM SATA 6Gb/s 32MB Cache 2.5-Inch Hard Drive price history

Lowest price we've seen: $18.95 on Nov 13 at eBay. Tracked across 6 stores since Nov 13.

What reviewers say

  • 4.6 / 5200 ratings

Owners rate it well as a cheap way to speed up an aging laptop, with most praise going to faster boots and app loads after the cache settles in. Critics note that it is still a mechanical drive and that the gains are inconsistent.

What people mention
  • SpeedMixedOwners say boots and repeat app launches speed up once the cache learns, but first-time reads stay hard-drive slow.
  • NoisePraisedMost describe it as quiet in a laptop, quieter than older 7200 RPM drives.
  • ReliabilityMixedMany drives run for years, but some owners report clicking noises or early failures.
  • InterfaceCriticisedThe SATA II link limits throughput compared with SATA III drives and SSDs.
  • ValuePraisedBuyers see it as a cheap upgrade over a plain hard drive for older machines.

About the Seagate ST500LX003 Momentus XT 500GB 7200RPM SATA 6Gb/s 32MB Cache 2.5-Inch Hard Drive

The Seagate Momentus XT (model ST500LX003) is a 500GB solid state hybrid drive (SSHD). It comes in a 2.5-inch, 9.5 mm form factor and connects over SATA.

The drive spins at 7200 RPM and has a 32 MB cache.

Model
ST500LX003
Capacity
500GB
Drive type
SSHD (solid state hybrid drive)
Speed
7200 RPM
Cache
32 MB
Interface
SATA
Form factor
2.5-inch, 9.5 mm

Questions and answers

Is this an SSD?
No. It is a hybrid: a 7200 RPM mechanical hard drive with a small flash cache. It behaves like a hard drive with faster repeat reads, not like a true SSD.
Will it work in my laptop?
It fits any bay that takes a 2.5-inch drive up to 9.5mm thick with a SATA connection. Check your machine's bay height and connector before buying.
Does it work on SATA III?
Yes, it is backward and forward compatible, but the drive itself is SATA II at 3Gb/s, so it will not use the full SATA III bandwidth.
How much faster is it than a normal hard drive?
Boots and frequently used apps load faster after the cache warms up. Large file transfers and first-time reads run at normal 7200 RPM hard-drive speed.
Is it good for a gaming PC?
For older consoles or budget builds it is fine. For modern games an SSD gives far shorter load times and better durability.
What comes in the box?
The drive itself. Cables, screws and cloning software are not included, so plan to reinstall or migrate your system.
Where is the Seagate ST500LX003 Momentus XT 500GB 7200RPM SATA 6Gb/s 32MB Cache 2.5-Inch Hard Drive cheapest?
At eBay, for $18.95, 86% under what the other stores charge, as of our latest check.
What do buyers say about the Seagate ST500LX003 Momentus XT 500GB 7200RPM SATA 6Gb/s 32MB Cache 2.5-Inch Hard Drive?
Rated 4.6 out of 5 from 200 ratings.
Where can I buy the Seagate ST500LX003 Momentus XT 500GB 7200RPM SATA 6Gb/s 32MB Cache 2.5-Inch Hard Drive?
6 stores we checked sell it, including eBay, CPU Medics, serverdiskdrives.com, ctspoint.com, Tech Atlantix.

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