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KingSpec 256GB SATA III SSD 6Gb/s, 2.5" SATA SSD with 3D NAND Flash, Internal Solid State Hard Drives, for Laptop and PC Desktop (R/W Speed up to 550/520 MB/s)
KingSpec

KingSpec 256GB SATA III SSD 6Gb/s

Bottom line: The KingSpec 256GB SATA III SSD 6Gb/s ($39.07 on Amazon as of 2026-10-06): 550/520 MB/s sequential read/write saturates most of the SATA 6Gb/s ceiling; main trade-off: 256GB fills fast if you store games or large media libraries.

$39.07

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Buy on Amazon — $39.07 Compare to similar ssds & storage

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For SSDs and PC storage upgrades, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ 550/520 MB/s sequential read/write saturates most of the SATA 6Gb/s ceiling
  • ✓ 3D NAND flash rather than older planar NAND
  • ✓ Full TRIM, S.M.A.R.T., wear leveling and garbage collection support
  • ✓ 3-year limited warranty plus lifetime technical support

Cons

  • ✗ 256GB fills fast if you store games or large media libraries
  • ✗ SATA III caps speed far below NVMe drives in the same price range
  • ✗ 2.5-inch form factor needs a bay or bracket, not an M.2 slot
  • ✗ No listed TBW or DWPD endurance rating to compare against rivals

Manufacturer description

The KingSpec 256GB SATA III SSD is a straightforward drop-in upgrade for aging laptops and desktops still running a mechanical hard drive. Built on 3D NAND flash, this 2.5-inch drive is rated for sequential reads up to 550 MB/s and writes up to 520 MB/s over a SATA Rev. 3.0 (6Gb/s) interface, which is close to the practical ceiling of the SATA bus, so you are getting most of what the connection can deliver. KingSpec includes the maintenance features you want in a boot drive: TRIM, S.M.A.R.T. monitoring, wear leveling, garbage collection, over-provisioning, and native command queuing. Because…

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SpecPicks Verdict

SpecPicks scored KingSpec 256GB SATA III SSD 6Gb/s using a rating × review-volume × price-fit model applied to published specs and reviews across the ssds & storage category. KingSpec's ssds & storage lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for ssds & storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

How fast is the KingSpec 256GB SSD?

KingSpec rates it at up to 550 MB/s sequential read and up to 520 MB/s sequential write over the SATA III 6Gb/s interface.

Will this SSD fit my laptop?

It is a standard 2.5-inch SATA drive compatible with laptops, desktops, and all-in-one computers that have a 2.5-inch SATA bay.

What operating systems does it support?

KingSpec lists Windows 7, 8, 8.1, 10 or later, plus DOS, Linux, and Unix. The SATA Rev. 3.0 interface is backward compatible with SATA Rev. 2.0.

Does it come with a warranty?

Yes, KingSpec backs the drive with a 3-year limited warranty and lifetime technical support. Check the product listing for current terms.

Is 256GB enough for a boot drive?

256GB comfortably holds Windows plus everyday applications, but heavy game or media storage will need a second drive.

Key Features

  • [ Fast and Extraordinary ]: KingSpec 2.5 SATAIII SSD adopts 3D NAND flash memory and semiconductor components, which makes it a high-performance and reliable storage device. Max Sequential read speeds are up to 550 MB/s and max sequential write speeds are up to 520 MB/s. which greatly improves the performance and efficiency of your computer. You get the experience of fast transfers and faster file loading
  • [ High-Performance ]: KingSpec 2.5 SATA SSD has the characteristics of shockproof and anti-drop, so you don't have to worry even if the computer drops. Quiet and noiseless, low power consumption, high and low-temperature resistance, faster-booting speed, and program loading speed
  • [ More Reliable &More Stable ]:The 2.5" SATA SSD supports wear leveling, garbage collection, over-provisioning, native command queuing, TRIM, S.M.A.R.T, etc, and also passed strict quality-test during the production process. That let it have stable and trustworthy performance, It's great for business and entertainment
  • [ Wide Compatibility ]: The Internal SATA SSD compatible with windows 10 / 8.1/8 /7 or later, DOS, Linux, Unix. The interface SATA Rev. 3.0 (6Gb/s) is backward compatible with SATA Rev. 2.0. compatible with laptops, desktops, and all-in-one computers
  • [ 3-Year Warranty ]: All KingSpec internal SSD is backed with a 3-year limited warranty, and enjoy lifetime technical support. We have strict control standards for our products, each hard drive has been tested countless times to ensure that there is no quality problem before sending it to you, Any questions or suggestions about the product, We will give you the most sincere service

Full Specifications

BrandKingSpec
ColorBlack
Model NameUSP3-256
Read Speed550 Megabytes Per Second
Form Factor2.5-inch
Media Speed520 megabits_per_second
Model NumberUSP3-256
CompatibilityPC, Linux
Built-In MediaSSD
Hard-Drive Size256 GB
Mfr Part Number在庫がありません
Number of Items1
Special FeatureBackward Compatible, Bad Block Management, Native Command Queuing, S.M.A.R.T, Wear Leveling
Installation TypeInternal Hard Drive
Compatible DevicesDesktop, Gaming Console, Laptop, Tablet
Data Transfer Rate6 Gigabits Per Second
Enclosure Material3D Nand Flash
Additional FeaturesBackward Compatible, Bad Block Management, Native Command Queuing, S.M.A.R.T, Wear Leveling
Hard Disk InterfaceSerial ATA-600
Warranty Description3 Year Warranty
Full listing titleKingSpec 256GB SATA III SSD 6Gb/s, 2.5" SATA SSD with 3D NAND Flash, Internal Solid State Hard Drives, for Laptop and PC Desktop (R/W Speed up to 550/520 MB/s)

Ready to buy?

KingSpec 256GB SATA III SSD 6Gb/s, 2.5" SATA SSD with 3D NAND Flash, Internal Solid State Hard Drives, for Laptop and PC Desktop (R/W Speed up to 550/520 MB/s) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $39.07

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

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KingSpec 256GB SATA III SSD 6Gb/s, 2.5" SATA SSD with 3D NAND Flash, Internal Solid State Hard Drives, for Laptop and PC Desktop (R/W Speed up to 550/520 MB/s)
$39.07
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