SP Silicon Power
Silicon Power-256GB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5" 7mm (0.28") Internal Solid State Drive
Bottom line: The Silicon Power-256GB SSD 3D NAND A55 SLC Cache Performance Boost SATA ($79.68 on Amazon as of 2026-10-21 16:15 UTC): TLC 3D NAND with SLC cache absorbs write bursts for faster everyday transfers; main trade-off: 256GB fills fast if you store games, video, or large photo libraries.
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*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.
Pros & Cons
Pros
- ✓ TLC 3D NAND with SLC cache absorbs write bursts for faster everyday transfers
- ✓ Rated up to 15x faster than a standard 5400 RPM hard drive
- ✓ 7mm 2.5-inch body fits nearly any laptop or desktop drive bay
- ✓ Shock- and vibration-proof with no moving parts, so it runs silent
Cons
- ✗ 256GB fills fast if you store games, video, or large photo libraries
- ✗ SATA III caps throughput far below any NVMe M.2 drive
- ✗ SLC cache benefit fades on sustained writes larger than the cache
- ✗ No bundled cloning software or 2.5-to-3.5 mounting bracket listed
Manufacturer description
The Silicon Power A55 256GB is an entry-level SATA III internal SSD built on TLC 3D NAND with an SLC cache layer that absorbs bursts of writes so everyday file copies and application loads finish faster than the raw NAND alone would allow. Silicon Power rates it at up to 15x faster than a standard 5400 RPM hard drive over the SATA III 6Gb/s interface, which is the practical reason most buyers pick this drive: it is the cheapest way to make an aging laptop or desktop feel responsive again. The 2.5-inch, 7mm (0.28") form factor drops into the standard drive bay of nearly any notebook or…
SpecPicks Verdict
SpecPicks scored Silicon Power-256GB SSD 3D NAND A55 SLC Cache Performance Boost SATA… using a rating × review-volume × price-fit model applied to published specs and reviews across the ssds & storage category. SP Silicon Power'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
Will this SSD fit in my laptop?
It uses the standard 2.5-inch form factor at 7mm (0.28") thick, which fits nearly every laptop and desktop 2.5-inch bay. Machines with a 9.5mm bay will need a spacer, which is not included.
How much faster is it than my old hard drive?
Silicon Power rates the A55 at up to 15x faster than a standard 5400 RPM HDD over the SATA III 6Gb/s interface. Boot times and application launches see the biggest gain.
What does the SLC cache actually do?
The drive is TLC 3D NAND, but a portion runs in faster single-bit SLC mode as a write buffer. Bursts of writes land in that cache at higher speed, then move to TLC in the background.
Is 256GB enough storage?
It comfortably holds Windows plus your everyday applications and documents. If you plan to store multiple modern games, 4K video, or a large photo library, step up to a larger capacity.
Does it come with cloning software or mounting hardware?
The listing states the box contains the A55 256GB SSD only. Check the product listing for current bundle contents and warranty terms before you buy.
Key Features
- improving overall performance: tlc 3d nand flash and "slc cache technology" optimising the overall performance
- 15 x faster than a standard 5400 hdd with sata iii 6gb/s interface
- low power consumption, shock and vibration-proof, noiseless and low latency
Full Specifications
| Brand | SP Silicon Power |
|---|---|
| Color | Black |
| Model Name | A55 |
| Read Speed | 550 megabytes_per_second |
| Unit Count | 1 Count |
| Form Factor | 2.5-inch |
| Media Speed | 420 Mb/s |
| Model Number | SP256GBSS3A55S25 |
| Built-In Media | 1 |
| Hard-Drive Size | 256 GB |
| Mfr Part Number | SP256GBSS3A55S25 |
| Number of Items | 1 |
| Special Feature | Fan diameter: 8 cm, Maximum temperature: 0 - 70 °C |
| Vibration/Rumble | Yes |
| Hardware Platform | laptop |
| Installation Type | Internal Hard Drive |
| Compatible Devices | Laptop |
| Data Transfer Rate | 750 megabytes_per_second |
| Enclosure Material | Aluminium Plastic |
| Additional Features | Fan diameter: 8 cm, Maximum temperature: 0 - 70 °C |
Ready to buy?
Silicon Power-256GB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5" 7mm (0.28") Internal Solid State Drive 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.
*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.
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