SP Silicon Power
Silicon Power 128GB A55 M.2 SSD (SLC Cache For Speed Boost) SATA III Internal Solid State Drive 2280 (SU128GBSS3A55M28AB)
Bottom line: The Silicon Power 128GB A55 M.2 SSD: Case-less M.2 2280 board (80 x 22 x 3.5 mm) fits ultrabooks and mini PCs; main trade-off: SATA III 6 Gb/s caps throughput far below an NVMe M.2 drive.
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Pros & Cons
Pros
- ✓ Case-less M.2 2280 board (80 x 22 x 3.5 mm) fits ultrabooks and mini PCs
- ✓ SLC Cache Technology buffers writes for burst speed and lower TLC wear
- ✓ Free SP Toolbox software monitors drive health after install
- ✓ 3-year warranty once you register on the Silicon Power site
Cons
- ✗ SATA III 6 Gb/s caps throughput far below an NVMe M.2 drive
- ✗ 128GB fills fast once Windows and a few games are installed
- ✗ TLC NAND endurance trails MLC drives on sustained heavy writes
- ✗ Warranty coverage requires product registration, not just the receipt
Manufacturer description
The Silicon Power A55 M.2 SSD is a 128GB SATA III drive built for the M.2 2280 slot, and it exists to solve one specific problem: getting a mechanical drive out of a thin machine without rebuilding the whole system. The case-less 80 x 22 x 3.5 mm board drops into ultrabooks, tablet PCs, and mini PCs where a 2.5-inch bay was never an option. Silicon Power pairs a TLC NAND array with SLC Cache Technology, which stages incoming writes in a faster single-bit region before folding them down, so short bursts of file copying and application loading feel quicker and the flash sees less wear over…
SpecPicks Verdict
SpecPicks scored Silicon Power 128GB A55 M.2 SSD (SLC Cache For Speed Boost) SATA III… 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
Is this an NVMe drive or a SATA drive?
It is a SATA III 6 Gb/s drive in an M.2 2280 form factor. Your motherboard slot must support SATA-mode M.2 (B-key or B+M key), not NVMe-only.
Will this fit in my laptop?
It uses the M.2 2280 form factor and measures 80 x 22 x 3.5 mm with a case-less design, so it fits ultrabooks, tablet computers, and mini PCs with a full-length M.2 slot.
Is 128GB enough for a Windows boot drive?
128GB holds Windows plus core applications, but leaves limited room for large game installs or media libraries. Many buyers pair it with a secondary storage drive.
What does the SLC Cache do?
SLC Cache Technology stages writes in a faster single-bit-per-cell region before committing them to the TLC NAND, which boosts burst performance and extends drive lifespan.
What warranty comes with it?
Silicon Power lists a 3-year warranty. Register the drive on the SP official website to activate full manufacturer warranty service and product support.
Key Features
- Compact M.2 form factor, ideal for ultrabooks, tablet computers and mini PCs.
- High quality controller and TLC NAND flash are applied to deliver high transfer speeds.
- SLC Cache Technology for performance boost and longer lifespan.
- Include the free-download SSD Health Monitor Tool - SP Toolbox Software.
- 3-year warranty. Please register your product via SP official website to get the complete manufacturer warranty services, product support and more.
Full Specifications
| Brand | SP Silicon Power |
|---|---|
| Color | 128GB |
| Model Name | A55 |
| Read Speed | 450 megabytes_per_second |
| Form Factor | M2 |
| Media Speed | 450-600 MB/s |
| Model Number | SU128GBSS3A55M28AB |
| Built-In Media | 1 x Silicon Power A55 M.2 2280 Internal Solid State Drive |
| Item Type Name | Silicon Power 128GB A55 M.2 2280 SSD (SLC Cache for Speed Boost) SATA III Internal Solid State Drive |
| Hard-Drive Size | 128 GB |
| Mfr Part Number | SU128GBSS3A55M28AB |
| Number of Items | 1 |
| Special Feature | TRIM Support |
| Hardware Platform | PC, laptop |
| Installation Type | Internal Hard Drive |
| Compatible Devices | Tablet |
| Data Transfer Rate | 6000 megabytes_per_second |
| Enclosure Material | PCBA |
| Additional Features | TRIM Support |
| Hard Disk Interface | Serial ATA-600 |
Ready to buy?
Silicon Power 128GB A55 M.2 SSD (SLC Cache For Speed Boost) SATA III Internal Solid State Drive 2280 (SU128GBSS3A55M28AB) 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.
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