PricepectAI-Verified Comparisons

Comparisons About

⌘K

Pricepect

Independent product comparisons to help you buy smarter.

Browse

Categories
Comparisons
Spec Comparisons
Head-to-Head
Search

Info

About
Privacy Policy
Terms of Service

Top Categories

Electronics
Home & Kitchen
Sports & Outdoors
Automotive

✓ Independent & Unbiased✓ AI-Verified Data✓ Expert-Reviewed

Pricepect participates in the Amazon Services LLC Associates Program. As an Amazon Associate, we earn from qualifying purchases. © 2026 Pricepect. All rights reserved.

Silicon Power 256GB SATA SSD — Review & Specs | Pricepect | Pricepect

Home Solid State DrivesSilicon Power 256GB SATA SSD

Silicon Power 256GB SATA SSD — image 1

SP Silicon Power

Silicon Power 256GB SATA SSD

Expert Review Analysis

The Silicon Power Ace A55 256 GB is a 2.5‑inch SATA III SSD that uses 3D NAND TLC flash with SLC Cache and a Phison PS3110‑S10 controller, delivering up to 550 MB/s read and 450 MB/s write speeds in a slim 7 mm, 63 g package.

✓ Best for: Budget‑conscious users upgrading older laptops, ultrabooks, or desktops that only support SATA III; ideal for OS boot drives, everyday file storage, and application loading where high capacity and low power draw are valued.✗ Not ideal for: Enthusiasts or professionals requiring top‑tier performance such as high‑end gaming, video editing, or large data workloads that benefit from NVMe speeds, as the SATA III ceiling will be a bottleneck.

Pros

✓High reliability and endurance thanks to 3D NAND TLC flash combined with SLC Cache technology.
✓Fast sequential read speed up to 550 MB/s and write speed up to 450 MB/s measured with ATTO benchmarks.
✓Ultra‑slim 7 mm profile and lightweight 63 g design make it ideal for thin laptops and ultrabooks.

Price History

Current

$58.97

Average

$25.67

Lowest

$17.79

Highest

$58.97

Price trend (90d):+47.5%

Best Seller Rank History

Now#327Best#31Worst#840 -150

Lower = better sales rank

Rating Trend

Rating4.5/ 5Reviews12,266+1,327 reviews -0.09

Specifications

Design

Height7 mm mm

Width70 mm mm

Length100 mm mm

Thickness7 mm mm

Weight63 g g

Features

Supported FeaturesTRIM, Garbage Collection, RAID ready, NCQ, ECC, S.M.A.R.T.

General

BrandSilicon Power

ModelSU256GBSS3A55S25AH

Warranty3 years

CompatibilityLaptops, Ultrabooks, ultra-slim notebooks

Performance

ControllerPhison PS3110-S10

Sequential Read Speed550 MB/s (ATTO) MB/s

Sequential Write Speed450 MB/s (ATTO) MB/s

MTBF1,500,000 hours

Power

Operation Voltage5 V

Vibration Resistance20 G

Shock Resistance1500 G G

Power ConsumptionLow power consumption

Storage

Capacity256 GB GB

NAND Type3D NAND TLC

DRAM CacheNanya

InterfaceSATA III (6 Gb/s)

Dimensions & Weight

Height0.2755905509 inches

Width2.755905509 inches

Depth3.93700787 inches

Research Sources

silicon-power.com

business.walmart.com

silicon-power.com

Similar Products

Gigastone SATA SSD 256GB (3-Pack) 2.5 inch SSD 540MB/s Upgrade Laptop PC Memory and Storage PS4 HDD Replacement 2.5" Internal Solid State Hard Drives SATA III SLC Cache 3D NAND Game Turbo Performance

Gigastone SATA SSD 256GB (3-Pack) 2.5 inch SSD 540MB/s Upgrade Laptop PC Memory and Storage PS4 HDD Replacement 2.5" Internal Solid State Hard Drives SATA III SLC Cache 3D NAND Game Turbo Performance

Gigastone

Gigastone SATA SSD 128GB (5-Pack) 2.5 inch SSD 500MB/s Upgrade Laptop PC Memory and Storage PS4 HDD Replacement 2.5" Internal Solid State Hard Drives SATA III SLC Cache 3D NAND Game Pro Performance

Gigastone SATA SSD 128GB (5-Pack) 2.5 inch SSD 500MB/s Upgrade Laptop PC Memory and Storage PS4 HDD Replacement 2.5" Internal Solid State Hard Drives SATA III SLC Cache 3D NAND Game Pro Performance

Gigastone

Fikwot FX815 256GB SSD, 2.5" SATA SSD, Internal Solid State Drive, Up to 560MB/s, 3D NAND SLC Cashe, Compatible with Laptop & PC Desktop

Fikwot FX815 256GB SSD, 2.5" SATA SSD, Internal Solid State Drive, Up to 560MB/s, 3D NAND SLC Cashe, Compatible with Laptop & PC Desktop

Fikwot

Fikwot FX660 1TB M.2 SSD, PCIe Gen 4x4 Dynamic SLC Cache - Speeds up to 4800MB/s M.2 2280 NVMe Internal SSD, Upgrade Storage for PC Computer, Laptop and PS5

Fikwot FX660 1TB M.2 SSD, PCIe Gen 4x4 Dynamic SLC Cache - Speeds up to 4800MB/s M.2 2280 NVMe Internal SSD, Upgrade Storage for PC Computer, Laptop and PS5

Fikwot

Gigastone 512GB NAS SSD Drive (2-Pack) 24/7 Durable TLC High Endurance RAID Data Storage Network Attached Storage 2.5" SATA Internal Solid State Hard Drives

Gigastone 512GB NAS SSD Drive (2-Pack) 24/7 Durable TLC High Endurance RAID Data Storage Network Attached Storage 2.5" SATA Internal Solid State Hard Drives

Gigastone

Fikwot FX550 NVMe SSD 512GB M.2 SSD PCIe 3.0×4, Read Up to 3,200 MB/s, M2 2280 Internal Soild State Drive, Compatible with Desktop, Laptop and Mini PC, QLC NAND Flash

Fikwot FX550 NVMe SSD 512GB M.2 SSD PCIe 3.0×4, Read Up to 3,200 MB/s, M2 2280 Internal Soild State Drive, Compatible with Desktop, Laptop and Mini PC, QLC NAND Flash

Fikwot

Bestoss 128GB 2.5 Inch SSD Internal Hard Drive for Pc or Laptop, SATA III 6Gb/s Internal State Drive, Up to 550MB/s, Upgrade for Office, Students, Home Entertainment

Bestoss 128GB 2.5 Inch SSD Internal Hard Drive for Pc or Laptop, SATA III 6Gb/s Internal State Drive, Up to 550MB/s, Upgrade for Office, Students, Home Entertainment

Bestoss

Bestoss 512GB 2.5 Inch SSD Internal Hard Drive for Pc or Laptop, SATA III 6Gb/s Internal State Drive, Up to 550MB/s, Computer Storage Upgrade for Office, Students, Home Entertainment

Bestoss 512GB 2.5 Inch SSD Internal Hard Drive for Pc or Laptop, SATA III 6Gb/s Internal State Drive, Up to 550MB/s, Computer Storage Upgrade for Office, Students, Home Entertainment

Bestoss

M.2 2280 NVMe SSD 512GB Internal PCIe Gen4, Up to 7200MB/s, SLC Cache & HMB, PS5/PC/Laptop, Tailored for Gamers, Video Editors, High-End Creators, and AI Developers Demanding Blazing-Fast Speed GM988

M.2 2280 NVMe SSD 512GB Internal PCIe Gen4, Up to 7200MB/s, SLC Cache & HMB, PS5/PC/Laptop, Tailored for Gamers, Video Editors, High-End Creators, and AI Developers Demanding Blazing-Fast Speed GM988

Bestoss

FN960 512GB M.2 NVMe SSD PCIe Ge...

M.2 NVMe SSD with Double Surface...

Silicon Power Gen4 4TB SSD Plus ...

Featured in Comparisons

Best Budget 2.5" SATA SSDs

Best Budget 2.5" SATA SSDs

roundup

User Reviews

Please sign in to leave a review

Sort by:

No reviews yet. Be the first to review!

4.5

(12,266 reviews)

$58.97

Track Price on BigBangPrice

Get notified when the price drops. Track this product on BigBangPrice, our price tracking partner.

SU256GBSS3A55S25AH256GB 3-year limited warranty. (Please register your product via SP official website to get the complete manufacturer warranty services, product support and more.)

Solid State Drives

✓Robust shock resistance of 1500 G and vibration resistance of 20 G protect the drive in mobile environments.

✓Low power consumption and noiseless operation enhance battery life and user comfort in portable devices.

Cons

✗SATA III interface caps maximum throughput well below modern NVMe SSDs, limiting overall performance.
✗Sustained write performance depends on the SLC cache and can drop significantly after the cache is exhausted.
✗Full three‑year warranty requires online registration, adding an extra step for owners seeking coverage.
✗Benchmarks show write speeds around 370 MB/s in CrystalDiskMark, which is slower than some competing SATA drives.
✗No direct consumer reviews or ratings are available in the data, making real‑world user experience harder to verify.

From Expert Reviews

Praised by Experts

✓EnosTech highlights the Phison PS3110‑S10 controller paired with Nanya DRAM as delivering solid SATA performance.
✓The reviewer praises the SLC Cache implementation for providing a noticeable boost in write speeds over basic TLC drives.
✓Professional assessment notes the 3D NAND chips and PCB layout contribute to reliability and endurance.

Criticized by Experts

✗EnosTech points out that the drive is still limited by SATA III bandwidth, preventing it from reaching NVMe‑level speeds.
✗The review mentions that sustained performance may fall off once the SLC cache is depleted, a common SATA limitation.

From User Reviews

Users Love

✓Customers appreciate the noticeable reduction in boot time when installing the SSD in older laptops.
✓Users like the thin 7 mm form factor, which fits easily into ultrabook chassis without compromising space.

Expert Opinion

Professional reviewers commend the Ace A55 for its solid SATA performance, thanks to the Phison controller, Nanya DRAM, and SLC Cache, while noting that its 3D NAND and robust PCB design enhance reliability. However, they also stress that the SATA III interface inherently limits peak speeds and that sustained writes can decline once the cache is exhausted.

What Users Say

Everyday users generally praise the drive for faster boot times and its slim, lightweight design that fits well in thin laptops, with no major complaints recorded in the available listings.

How It Compares

vs. Crucial BX500 240 GB

Advantages

✓Slightly higher advertised write speed of 500 MB/s in ATTO benchmarks.
✓Widely available and often priced competitively.

Disadvantages

✗Lacks DRAM cache, which can lead to lower sustained write performance compared to the Ace A55.
✗Does not advertise SLC Cache technology for write acceleration.

Choose the BX500 if you need a low‑cost SSD and can tolerate lower sustained write performance; choose the Ace A55 for better endurance and cache‑assisted writes.

vs. WD Blue SA510 250 GB

Advantages

✓Offers comparable read speeds (560 MB/s) and includes DRAM for improved performance.
✓Strong brand reputation and extensive warranty support.

Disadvantages

✗Write speed advertised at 520 MB/s, but real‑world sustained writes may lag without a cache system.
✗Shock resistance specifications are similar but not highlighted as a key feature.

The SA510 is a solid alternative with similar performance; the Ace A55 edges ahead with its explicit SLC Cache and proven low‑power operation.

vs. Kingston A400 240 GB

Advantages

✓Often priced lower than the Ace A55, making it attractive for ultra‑budget builds.
✓Simple plug‑and‑play SATA III compatibility.

Disadvantages

✗No DRAM cache and no SLC Cache, resulting in slower sustained write speeds.
✗Lower shock resistance rating than the Ace A55's 1500 G rating.

The A400 is suitable for the cheapest upgrades where performance is not critical; the Ace A55 provides better durability and write consistency for a modest price premium.