SP Silicon Power
Silicon Power 2-Pack 128GB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5" 7mm (0.28") Internal Solid State Drive
Bottom line: The Silicon Power 2-Pack 128GB SSD 3D NAND A55 SLC Cache Performance: Two 128GB drives per pack — enough to upgrade a pair of machines at once; main trade-off: 128GB per drive is tight for a modern Windows install plus games.
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Pros & Cons
Pros
- ✓ Two 128GB drives per pack — enough to upgrade a pair of machines at once
- ✓ 3D NAND with SLC Cache lifts peak write speed and cuts write amplification
- ✓ 7mm height fits Ultrabooks and ultra-slim notebooks that reject 9.5mm drives
- ✓ 3-year limited warranty after registering on the SP Silicon Power site
Cons
- ✗ 128GB per drive is tight for a modern Windows install plus games
- ✗ SATA III caps throughput far below an NVMe M.2 drive
- ✗ SLC cache is a burst buffer — sustained large writes drop to native speed
- ✗ Full warranty service requires registering the product on SP's website
Manufacturer description
Silicon Power's Ace A55 2-pack gives you two 128GB SATA III drives for the price most brands charge for one, making it a practical pick if you're reviving a pair of older laptops or building out a small lab. Each drive uses 3D NAND flash paired with SLC Cache Technology, which writes incoming data to a faster SLC portion first — that raises peak write speed and reduces write amplification, so the drive lasts longer under repeat use. The payoff you actually notice is boot time: swapping a mechanical hard drive for the A55 shortens startup, speeds application loading, and makes file transfers…
SpecPicks Verdict
SpecPicks scored Silicon Power 2-Pack 128GB SSD 3D NAND A55 SLC Cache Performance… 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
How much storage do you actually get in this pack?
Two separate 128GB drives, not a single 256GB volume. Each is its own SATA III SSD, so you can put them in two different machines or run both in one desktop.
Will this fit in a thin laptop?
Yes. It uses the 2.5-inch form factor at 7mm (0.28") thickness, which Silicon Power specifies as suitable for Ultrabooks and ultra-slim notebooks. Bays built for 9.5mm drives fit 7mm drives with a spacer.
What does SLC Cache Technology do?
It writes incoming data to an SLC portion of the flash first, raising peak write performance. Silicon Power notes it also reduces write amplification, which improves endurance and extends the drive's lifespan.
What warranty comes with the Ace A55?
A 3-year limited warranty. Silicon Power asks you to register the product on its official website to receive complete manufacturer warranty service and product support.
Is 128GB enough for a boot drive?
It works for a lightweight OS install, an older laptop revival, or a dedicated boot drive with data stored elsewhere. If you plan to install large games or a big media library, size up.
Key Features
- 3D NAND flash are applied to deliver high transfer speeds
- Remarkable transfer speeds that enable faster bootup and improved overall system performance. The advanced SLC Cache Technology allows performance boost and longer lifespan
- 7mm slim design suitable for Ultrabooks and Ultra-slim notebooks.
- 3-year limited 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 | A55 |
| Model Name | S2128GBSS3A55S25AD |
| Unit Count | 2 Count |
| Form Factor | 2.5-inch |
| Media Speed | [haut débit d'écriture] |
| Model Number | S2128GBSS3A55S25AD |
| Built-In Media | 2 x Silicon Power Ace A55 Solid State Drive |
| Hard-Drive Size | 128 GB |
| Mfr Part Number | S2128GBSS3A55S25AD |
| Number of Items | 2 |
| Special Feature | Advanced SSD Technology with SLC Cache, Bad Block Management, and SP Toolbox Software for Performance, Reliability, and Monitoring |
| Hardware Platform | x86_64 |
| Installation Type | Internal Hard Drive |
| Compatible Devices | Laptop |
| Enclosure Material | NAND flash memory |
| Additional Features | Advanced SSD Technology with SLC Cache, Bad Block Management, and SP Toolbox Software for Performance, Reliability, and Monitoring |
| Hard Disk Interface | SATA 6 GB/s |
| Warranty Description | 3 year limited warranty |
| Customer Package Type | FFP |
Ready to buy?
Silicon Power 2-Pack 128GB 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.
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