Transcend or SP Silicon Power? Nvme SSDs Compared in 2026
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This SP Silicon Power vs transcend nvme SSD comparison looks at two distinct SATA drives. Both use SLC caching and 3D NAND for reliable performance. The main difference lies in their physical form factors. One is a compact M.2 stick, while the other is a standard 2.5-inch drive. You need to match the drive to your motherboard or laptop slot. Let’s look at how the specs compare in practice.
Key differences
| Aspect | Transcend 120GB M.2 2242 SATA SSD | Silicon Power A55 512GB 2.5-Inch SATA SSD |
|---|---|---|
| Form Factor | M.2 2242 | 2.5 inch |
| Interface | SATA III 6GB/s | SATA III |
| Max Read Speed | up to 560MB/sec | not listed |
| Max Write Speed | up to 500MB/sec | not listed |
| Cache Type | SLC Cache | SLC Cache |
| Warranty | 3-year | 3-year limited |
Which one should you choose?
Choose Transcend 120GB M.2 2242 SATA SSD if
- You need a drive for a small laptop or motherboard with an M.2 2242 slot.
- You want confirmed sequential read and write speeds of 560MB/sec and 500MB/sec.
- You prefer a drive with a specific model number for precise compatibility checks.
Choose Silicon Power A55 512GB 2.5-Inch SATA SSD if
- You have a desktop PC or older laptop that uses standard 2.5-inch drive bays.
- You require more storage capacity, starting at 512GB for this specific model.
- You want a drive that supports ECC and Garbage Collection technology for enhanced reliability.
Verdict: Choose the Transcend if your system requires an M.2 2242 form factor and you need verified speed specs. Pick the SP Silicon Power if you are installing into a standard 2.5-inch bay or need a larger base capacity. Both offer SATA III speeds and similar warranty terms.
Transcend vs Silicon Power SSDs
Form factor
You need to match the drive to your motherboard or enclosure. The Transcend 120GB MTS420S uses a compact M.2 2242 form factor. It measures 3.15 inches by 0.87 inches. This small size fits into modern laptops and mini-PCs that lack space for larger drives. The Silicon Power A55 uses a standard 2.5-inch form factor. It measures 3.94 inches by 2.75 inches. This traditional size is compatible with almost all desktops and older laptops. If you have an older system, the Silicon Power is likely the only option. If you have a slim laptop, the Transcend is the better fit.
Storage capacity
Capacity determines how much data you can store. The Transcend model listed here offers 120GB of storage. This is a small amount, suitable for a boot drive or light office work. The Silicon Power model offers 512GB of storage. This provides significantly more room for files, applications, and media. While both brands offer variations in capacity, the specific items compared here differ greatly. The Silicon Power drive gives you four times the space. If you need to store large files, the Silicon Power is the clear choice. The Transcend is only viable if you have very limited storage needs.
Transfer speed
Speed affects how fast files load and copy. Both drives use the SATA III interface, which caps theoretical speeds at 6GB/s. The Transcend MTS420S lists read speeds up to 560MB/sec and write speeds up to 500MB/sec. The Silicon Power A55 does not list specific speed numbers in the provided data. Both use SATA III, so they share the same bandwidth limit. In practice, both will feel similar for everyday tasks. Neither will outperform NVMe drives. The Transcend has published numbers, while the Silicon Power relies on general claims of high transfer speeds. Both are adequate for standard SATA usage.
Cache type
Cache helps manage data flow for better performance. Both the Transcend MTS420S and the Silicon Power A55 utilize SLC caching technology. This method uses a portion of the NAND flash to operate at higher speeds before slowing down. This helps maintain performance during burst transfers. The Silicon Power notes that this technology also aids in longer lifespan. The Transcend does not explicitly mention lifespan benefits from the cache in the specs. However, the core mechanism is identical. Both drives rely on this same caching strategy to boost performance. You get the same functional benefit from both regarding cache management.
NAND type
The type of flash memory impacts reliability and density. The Transcend MTS420S explicitly states it uses premium 3D TLC NAND flash memory chips. The Silicon Power A55 mentions the application of 3D NAND flash but does not specify if it is TLC, MLC, or QLC. Both use 3D NAND, which stacks cells vertically for better density. The Transcend provides more specific detail about being TLC. This is a common type for consumer drives. The Silicon Power is less specific. You get confirmed TLC from Transcend, while Silicon Power confirms 3D structure but not the exact layer type.
Warranty
Warranty coverage protects your investment. The Transcend MTS420S is backed by a 3-year warranty. The Silicon Power A55 also includes a 3-year limited warranty. Both brands offer the same duration of coverage. The Silicon Power notes that you must register your product on their official website to get complete manufacturer warranty services. The Transcend does not mention a registration requirement in the provided data. The length of coverage is identical. The process to claim service may differ slightly based on registration needs. You get equal time protection from both manufacturers.
Which SSD fits your setup best
Users with compact M.2 laptops or mini-PCs
This Transcend drive uses the M.2 2242 form factor. It measures just 3.15 inches long. This compact size fits into tight spaces where standard 2.5-inch drives will not fit. It connects via SATA III 6GB/s and offers read speeds up to 560MB/sec. You get reliable performance from 3D TLC NAND and SLC caching in a small package.
Buyers needing high storage capacity on a budget
The Silicon Power A55 provides 512GB of storage. This is significantly more space than the 120GB Transcend option. It uses a standard 2.5-inch form factor. This size is compatible with most desktops and older laptops. It also includes ECC for enhanced reliability and supports TRIM commands. You get more data storage for the same interface type.
Those upgrading older desktops or standard laptops
This drive uses the standard 2.5-inch SATA form factor. It fits into traditional drive bays found in most desktop towers and older laptops. The 7mm height ensures it works in slim notebooks. You benefit from 3D NAND flash and SLC cache technology. This combination helps deliver higher transfer speeds and improved system performance for everyday tasks.
The products compared
Transcend 120GB M.2 2242 SATA SSD
Best for: compact builds needing M.2 2242 storage
- Storage Capacity
- 120GB
- Interface
- SATA III 6GB/s
- Max Read Speed
- 560MB/sec
- Max Write Speed
- 500MB/sec
- Cache Type
- SLC Cache
- Form Factor
- M.2 2242
View on Amazon: Transcend 120GB M.2 2242 SATA SSD Affiliate link
The Transcend MTS420S is a 120GB M.2 2242 SSD with a SATA III interface. It offers read speeds up to 560MB/s and write speeds up to 500MB/s. The drive uses 3D TLC NAND flash and includes SLC Cache. It fits compact systems requiring the smaller 2242 form factor. This model is ideal for users needing basic storage expansion in limited spaces.
Pros
- SATA III 6GB/s interface for broad compatibility
- Read speeds up to 560MB/sec
- Compact M.2 2242 form factor
- 3-year warranty coverage
Cons
- 120GB capacity is small by modern standards
- SATA III limits speed compared to NVMe drives
- 2242 size may not fit all M.2 slots
Good fit if
- You need a drive for a compact Mini-ITX build
- You want to upgrade an older laptop with an M.2 slot
- You require a reliable budget storage option for light tasks
Skip if
- You need high-speed large file transfers
- Your motherboard only supports the longer 2280 M.2 size
- You require more than 120GB of storage space
Verdict: Transcend MTS420S 120GB M.2 SATA SSD is a solid choice for small form factor builds. It suits users who prioritize physical size over raw speed or capacity.
Silicon Power A55 512GB 2.5-Inch SATA SSD
Best for: desktops and older laptops needing SATA storage
- Storage Capacity
- 512GB
- Interface
- SATA III
- Form Factor
- 2.5''
- Cache Type
- SLC Cache
- Dimensions
- 3.94 × 2.75 × 0.28 inches
- Weight
- 1.76 ounces
View on Amazon: Silicon Power A55 512GB 2.5-Inch SATA SSD Affiliate link
The Silicon Power A55 is a 2.5-inch SATA III drive with 512GB of storage. It uses 3D NAND flash and SLC cache technology to boost transfer speeds and extend lifespan. The 7mm slim profile fits ultrabooks and standard notebooks. You get hardware support for TRIM, garbage collection, and ECC for reliable data handling. This drive suits users needing a straightforward internal upgrade for older systems or desktops.
Pros
- 512GB storage capacity in a standard 2.5-inch form factor
- SATA III interface with SLC cache for improved performance
- 7mm slim design suitable for ultrabooks and slim notebooks
- Supports TRIM, garbage collection, and ECC for reliability
Cons
- SATA III interface limits speed compared to NVMe options
- 2.5-inch form factor is bulkier than M.2 drives
- 3-year limited warranty is shorter than some competitors
Good fit if
- You need a 2.5-inch SATA drive for a desktop or older laptop
- You want 512GB of storage with SLC cache technology
- You are upgrading a system that requires a 7mm slim profile
Skip if
- You require the high speeds of an NVMe M.2 drive
- You need an M.2 form factor for a modern ultrabook
- You want a warranty longer than three years
Verdict: Silicon Power A55 512GB 2.5" SATA SSD is a reliable internal drive for users upgrading desktops or older laptops who need standard SATA connectivity. It fits well if you prioritize SLC cache longevity and a slim 7mm profile over raw speed.
Specifications side by side
| Spec | Transcend 120GB M.2 2242 SATA SSD | Silicon Power A55 512GB 2.5-Inch SATA SSD |
|---|---|---|
| Storage Capacity | 120GB | 512GB |
| Interface | SATA III 6GB/s | SATA III |
| Form Factor | not stated | 2.5'' |
| Max Read Speed | 560MB/sec | not stated |
| Max Write Speed | 500MB/sec | not stated |
| Cache Type | SLC Cache | SLC Cache |
| Compatibility | Laptop, Desktop | not stated |
| Size | 120GB | 512GB |
| Dimensions | 0.87 × 0.15 × 3.15 inches | 3.94 × 2.75 × 0.28 inches |
| Weight | not stated | 1.76 ounces |
| Color | Multicoloured | 512GB |
| Model | TS120GMTS420S | SP512GBSS3A55S25 |
Frequently asked questions
Is the Transcend MTS420S an NVMe drive?
No, the Transcend MTS420S is not an NVMe drive. It uses the SATA III interface. You will find this in the product attributes. It is a SATA SSD designed for M.2 2242 slots. This means it relies on the SATA protocol for data transfer rather than the faster PCIe lanes used by NVMe drives.
Does the Silicon Power A55 use NVMe technology?
No, the Silicon Power A55 is also a SATA drive. It connects via the SATA III interface. The product data confirms this interface type. It is a 2.5-inch drive, which is a standard form factor for SATA connections. It does not utilize the NVMe protocol for communication with your system.
What cache type do these drives use?
Both drives utilize SLC caching to manage data. The Transcend MTS420S lists SLC Cache in its attributes. The Silicon Power A55 also relies on SLC caching for performance. This technique uses a portion of the NAND flash to act as a high-speed buffer. It helps maintain steady write speeds during heavy data transfers.
Can I use the Transcend drive in a standard 2.5-inch slot?
No, the Transcend MTS420S uses the M.2 2242 form factor. It measures 3.15 inches by 0.87 inches. This is a smaller stick shape, not a 2.5-inch block. You need a motherboard with an M.2 2242 slot. It will not fit into standard 2.5-inch drive bays designed for larger SATA SSDs.
Which drive is better for a desktop upgrade?
The Silicon Power A55 is better for most desktops. It uses the standard 2.5-inch form factor. This shape fits easily into desktop chassis and older laptops. The Transcend drive is too small and uses a different connector. Unless you have a specific mini-PC, the 2.5-inch drive offers more universal compatibility for desktop upgrades.
What is the storage capacity of the Silicon Power drive?
The Silicon Power A55 offers 512GB of storage. This is listed in both its attributes and specs. It provides a moderate amount of space for operating systems and applications. The Transcend drive only offers 120GB. If you need more room for files, the 512GB option is the only choice between these two.