SSDs / Compare

Fanxiang S101 vs Silicon Power Ace A55

A

Product A: Fanxiang

S101

20 of 63 known

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B

Product B: Silicon Power

Ace A55

19 of 63 known

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Every value links to where we found it.

Only differences

AFanxiang S101

BSilicon Power Ace A55

General

2 of 9 differ

Series

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Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

S1013Retailer pageamazon.com/dp/B09XDJ673FRead 16 October 2026Item details read Model Number S101 and Mfr Part Number S101

SP128GBSS3A55S25, SPJ128GBSS3A55B, SU128GBSS3A55S25EU, SP256GBSS3A55S25, SPJ256GBSS3A55B, SU256GBSS3A55S25EU, SU256GBSS3A55S25AH, SP512GBSS3A55S25, SPJ512GBSS3A55B, SU512GBSS3A55S25EU, SP001TBSS3A55S25, SPJ001TBSS3A55B, SU001TBSS3A55S25EU, SU001TBSS3A55S25AC, SP002TBSS3A55S25, SPJ002TBSS3A55B, SU002TBSS3A55S25EU, SU002TBSS3A55S25SN, SP004TBSS3A55S25, SPJ004TBSS3A55B, SP004TBSS3A55S25AY, SP008TBSS3A55S25, SP016TBSS3A55S251Maker product pagesilicon-power.com/product-detail/Ace_A55Read 15 October 2026The price table lists a P/N per capacity. Each capacity has an SP, an SPJ and an SU code, and some have a regional suffix such as EU, AC, SN or AY. The page does not say what the prefixes and suffixes mean. They are stored as one list per capacity.2Maker spec sheet (PDF)silicon-power.com/download-detail/edm-ace-a55Read 15 October 2026Ordering Information lists only 2TB SP002TBSS3A55S25, 4TB SP004TBSS3A55S25, 8TB SP008TBSS3A55S25 and 16TB SP016TBSS3A55S25, and says more part numbers are available from sales.3Maker product pageweb.archive.org/web/20251216203842/https://sp-siliconpower.com/products/a55-128gb-2tb-sata-iii-2-5-inch-internal-solid-state-driveRead 21 October 2026The US store sells the 256GB as SU256GBSS3A55S25AH, a code that the global page does not list. It is added to the 256GB list

GTIN / EAN

792288883696, 792288883702, 792288883719, 792288883726, 7922888837332Maker product pagefanxiangssd.com/products/internal-solid-state-drive-fanxiang-s101-1tb-ssd.jsonRead 16 October 2026Store product feed barcodes: 792288883696 (256GB), 792288883702 (512GB), 792288883719 (1TB), 792288883726 (2TB), 792288883733 (4TB). All five are valid UPC-A codes. The feed lists store SKUs 1.SA.S1012569, 1.SA.S1015128, 1.SA.110101T7, 1.SA.S10102T7 and 1.SA.S10104T1 in the same order, which are not stored as model numbers

886576030425, 886576078304, 886576030449, 886576030456, 886576037912, 8865760696783Maker product pageweb.archive.org/web/20251216203842/https://sp-siliconpower.com/products/a55-128gb-2tb-sata-iii-2-5-inch-internal-solid-state-driveRead 21 October 2026Variant barcodes from the store page data of the same capture: 886576030425 (128GB, SP128GBSS3A55S25), 886576078304 (256GB, SU256GBSS3A55S25AH), 886576030449 (512GB, SP512GBSS3A55S25), 886576030456 (1TB, SP001TBSS3A55S25), 886576037912 (2TB, SP002TBSS3A55S25), 886576069678 (4TB, SP004TBSS3A55S25). These are 12-digit UPCs for the US store. EAN barcodes for other markets are not stored, since the retailer listings that show them disagree on the part number

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

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Status

Available1Maker product pagefanxiangssd.com/products/internal-solid-state-drive-fanxiang-s101-1tb-ssdRead 16 October 2026Fanxiang store page has Add to cart for 128GB, 256GB, 512GB, 1TB, 2TB and 4TB. It also lists 250GB and 500GB options with no data, which are not stored3Retailer pageamazon.com/dp/B09XDJ673FRead 16 October 2026Amazon US 1TB listing in stock on 2026-10-16, sold by LDCEMS, with about 23,700 ratings

Available1Maker product pagesilicon-power.com/product-detail/Ace_A55Read 15 October 2026The page is live and lists the drive with a purchase tab.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

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SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

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Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

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Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

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MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

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ColoursiThe maker's own colour names

Black3Retailer pageamazon.com/dp/B09XDJ673FRead 16 October 2026Additional details read Color black

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Form factoriPhysical size of the drive. External is any drive in its own case that connects by cable. A drive sold in two M.2 lengths is two products. Xbox expansion card is a card for the storage expansion slot of an Xbox Series console.

2.5-inch1Maker product pagefanxiangssd.com/products/internal-solid-state-drive-fanxiang-s101-1tb-ssdRead 16 October 2026Gallery images and the title read 2.5 inch SATA III. A gallery image reads 7 mm thickness

2.5-inch1Maker product pagesilicon-power.com/product-detail/Ace_A55Read 15 October 20262Maker spec sheet (PDF)silicon-power.com/download-detail/edm-ace-a55Read 15 October 2026

CapacityiNominal capacity before formatting, in decimal GB. A published 1 TB is 1000 GB. A published 1024GB stays 1024. The marketed capacity is stored, not a raw or usable figure from the same table, such as OWC's 2048 GB total and 1920 GB usable for a 2.0TB drive.

128 GB, 256 GB, 512 GB, 1 TB, 2 TB, 4 TB1Maker product pagefanxiangssd.com/products/internal-solid-state-drive-fanxiang-s101-1tb-ssdRead 16 October 2026Capacity selector and the parameter image read 128GB, 256GB, 512GB, 1TB, 2TB and 4TB

128 GB, 256 GB, 512 GB, 1 TB, 2 TB, 4 TB, 8 TB, 16 TB1Maker product pagesilicon-power.com/product-detail/Ace_A55Read 15 October 2026Capacity row reads 128GB, 256GB, 512GB, 1TB, 2TB, 4TB, 8TB, 16TB. The datasheet footnote says 1GB equals 1 billion bytes.2Maker spec sheet (PDF)silicon-power.com/download-detail/edm-ace-a55Read 15 October 2026

Interface

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InterfaceiFastest host connection the drive is rated for. The PCIe generation of an NVMe drive is its own field. A Thunderbolt drive that also works over USB uses its Thunderbolt version.

SATA1Maker product pagefanxiangssd.com/products/internal-solid-state-drive-fanxiang-s101-1tb-ssdRead 16 October 2026Specifications table reads SATA III. The page text reads SATA III 6Gb/s

SATA1Maker product pagesilicon-power.com/product-detail/Ace_A55Read 15 October 20262Maker spec sheet (PDF)silicon-power.com/download-detail/edm-ace-a55Read 15 October 2026

PCIe generationiHighest PCIe generation the drive supports, e.g. 5 for PCIe 5.0. NVMe drives only. A drive rated for PCIe 4.0 x4 or 5.0 x2 is 5 with 2 lanes, and the source note names both modes.

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PCIe lanesiLanes the drive uses at its highest PCIe generation, usually 4. NVMe drives only.

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NVMe versioniVersion of the NVMe specification as published. A revision letter is left out, so 2.0d is stored as 2.0.

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Detachable cableiExternal drives. No means the cable is fixed to the drive.

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Hardware

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ControlleriController maker and model as named by the maker or a review. On an external drive, the controller of the SSD inside, not the USB or Thunderbolt bridge chip. The bridge chip goes in the source note.

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Flash typeiBits stored in each flash cell. TLC stores three and QLC stores four. A maker can use another flash type in some capacities, so it is per variant.

TLC3Retailer pageamazon.com/dp/B09XDJ673FRead 16 October 2026Title and bullets read 3D NAND TLC chips, and the brand's feature banner reads TLC 3D NAND with an SLC cache. The maker's store page names 3D NAND without TLC

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Flash memoryiFlash maker and generation as named by the maker or a review.

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Flash layersiStacked layers of the 3D flash, from the maker or a review.

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DRAM cacheiDRAM is a memory chip on the drive. HMB is a drive without DRAM that borrows host memory. None has neither. HMB not stated is a drive without DRAM where no source says whether it borrows host memory. An external drive counts when a source names the cache of the drive inside.

None5Reviewsynccomputers.co.uk/fanxiang-s101-2-5-sata-ssd-reviewRead 21 October 2026Sync Computers review of 26 June 2026. The spec list reads SLC Cache (no DRAM) and the text says the S101 has no DRAM buffer, so the drive writes at native TLC speed once the SLC cache is full. The maker's pages say only SLC cache. SATA has no host memory buffer, so the value is none. A non-lab review that does not name the tested capacity or the controller

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DRAM cache sizeiSize of the DRAM on the drive. Any DRAM type counts, such as DDR4 or LPDDR4X. Host memory buffer (HMB) is not DRAM on the drive.

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Component sidesiWhether chips sit on one or both sides of the board. Thin laptops and some handhelds need single-sided drives. M.2 drives only. The M.2 module code states it: S is single-sided and D is double-sided, e.g. 2280-S3-M or 2280-D5-M.

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Performance

2 of 4 differ

Sequential read (claimed)iMaker's up-to sequential read speed for this capacity. Test conditions are in the source note.

520MB/s1Maker product pagefanxiangssd.com/products/internal-solid-state-drive-fanxiang-s101-1tb-ssdRead 16 October 2026Gallery parameter table (file 128GB-4TB.jpg), up to values: 128GB 500 MB/s, 256GB 500, 512GB 500, 1TB 520, 2TB 520, 4TB 500. Test host and tool are not stated. The page title says up to 550MB/s and the older Amazon listing said 550 read and 500 write, so the maker's claims differ between pages. The parameter table is used for every capacity3Retailer pageamazon.com/dp/B09XDJ673FRead 16 October 2026A+ Product Parameters table matches the maker's store table for all six capacities

500MB/s1Maker product pagesilicon-power.com/product-detail/Ace_A55Read 15 October 2026Performance Read (max.) row: 460 MB/s for 128GB and 256GB, 500 MB/s for 512GB and up. The base is the 2TB model. No test tool or host is named. The page note says results vary with platform, software, interface and capacity.2Maker spec sheet (PDF)silicon-power.com/download-detail/edm-ace-a55Read 15 October 2026

Sequential write (claimed)iMaker's up-to sequential write speed for this capacity. Makers usually measure it inside the fast write cache.

480MB/s1Maker product pagefanxiangssd.com/products/internal-solid-state-drive-fanxiang-s101-1tb-ssdRead 16 October 2026Same table: 128GB 350 MB/s, 256GB 400, 512GB 450, 1TB 480, 2TB 480, 4TB 4703Retailer pageamazon.com/dp/B09XDJ673FRead 16 October 2026Same A+ table

450MB/s1Maker product pagesilicon-power.com/product-detail/Ace_A55Read 15 October 2026Performance Write (max.) row: 360 MB/s for 128GB, 450 MB/s for 256GB and up. The base is the 2TB model.2Maker spec sheet (PDF)silicon-power.com/download-detail/edm-ace-a55Read 15 October 2026

Random 4K read (claimed)iMaker's up-to random read speed with 4 KB blocks. Queue depth and threads are in the source note. The maker's headline claim. Makers test at different queue depths, so compare with care. The queue depth 1 measured fields compare better.

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Random 4K write (claimed)iMaker's up-to random write speed with 4 KB blocks. Queue depth and threads are in the source note. The maker's headline claim. Makers test at different queue depths, so compare with care. The queue depth 1 measured fields compare better.

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Endurance and reliability

2 of 3 differ

Endurance (TBW)iTerabytes that can be written within the warranty, as the maker rates them.

1,200TB1Maker product pagefanxiangssd.com/products/internal-solid-state-drive-fanxiang-s101-1tb-ssdRead 16 October 2026Same table: 128GB 80 TBW, 256GB 150, 512GB 300, 1TB 600, 2TB 1200, 4TB 12003Retailer pageamazon.com/dp/B09XDJ673FRead 16 October 2026Same A+ table

600TB4Maker spec sheet (PDF)silicon-power.com/document/ssd_tbwRead 15 October 2026Silicon Power SSD TBW table, file dated 2026-08-05. The A55 row of the SATA III 2.5 inch table lists 37 TB (128GB), 75 (256GB), 150 (512GB), 300 (1TB), 600 (2TB), 1200 (4TB) and 2400 (8TB). 16TB is not in the table. The separate A55 M.2 row is a different product.

MTBF or MTTF (claimed)iMean time between failures, or mean time to failure when the maker publishes MTTF. The source note says which. Some makers state it per capacity, so it is per variant.

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1,500,000h1Maker product pagesilicon-power.com/product-detail/Ace_A55Read 15 October 2026MTBF (est) row reads 1,500,000 hours. The datasheet row says MTBF (test) with the same value. Stored as MTBF.2Maker spec sheet (PDF)silicon-power.com/download-detail/edm-ace-a55Read 15 October 2026MTBF (test) 1,500,000 hours.

Operating temperatureiMaker's operating range. The storage range is not stored.

Min0Max70°C3Retailer pageamazon.com/dp/B09XDJ673FRead 16 October 2026Brand A+ image Product Parameters reads Working TEMP 0 to 70 C. Storage TEMP of -25 to 85 C is not stored

Min0Max70°C3Maker product pageweb.archive.org/web/20251216203842/https://sp-siliconpower.com/products/a55-128gb-2tb-sata-iii-2-5-inch-internal-solid-state-driveRead 21 October 2026Silicon Power's own US store page for the A55 128GB-4TB, archived 2025-12-16, Product Specifications: Operating temperature 0 C to 70 C and storage temperature -40 C to 85 C (only the operating range is stored). The same page lists the same MTBF, shock and vibration ratings and warranty as the 2026 global page. The global page and the 2026 flyer no longer print a temperature range, and the live US page no longer shows it either

Power

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Power while reading (claimed)iMaker's average power during sequential reads, including a figure given at the full read speed. A single average or active figure with no read and write split, such as Corsair's, is stored in both read and write, and the source note says so. A maximum figure, such as Kingston's (MAX) Read, is a peak and is not stored.

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Power while writing (claimed)iMaker's average power during sequential writes. A single average or active figure with no read and write split is stored in both read and write, and the source note says so. A maximum figure, such as Kingston's (MAX) Write, is a peak and is not stored.

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Max power consumption (claimed)iMaker's peak or maximum power figure. Not the average while reading or writing. Kingston publishes max read and max write power apart. Store the higher one and name both in the source note.

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Average power in light use (claimed)iMaker's average over a mixed client workload such as MobileMark. Not idle power and not read or write power.

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Idle power (claimed)iMaker's idle power in the PS3 state with APST on, or the state the maker calls low-power idle. On a SATA drive, Slumber counts as low-power idle. A plain idle figure with no low-power state, often near 1 W, is active idle and is not stored. Samsung's Idle with DIPM on is a SATA link power state, so it counts as low-power idle.

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Sleep power (claimed)iMaker's power in the deepest sleep state, PS4 or L1.2. On a SATA drive this is DevSleep.

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Measured

None of 9 known

Sequential read (measured)iCrystalDiskMark SEQ1M Q8T1 read result from a reviewer. Host and slot are in the source note. KitGuru's default profile counts as SEQ1M Q8T1.

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Sequential write (measured)iCrystalDiskMark SEQ1M Q8T1 write result from a reviewer. Host and slot are in the source note.

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Random 4K read at queue depth 1 (measured)iCrystalDiskMark RND4K Q1T1 read result from a reviewer. Small reads one at a time, close to everyday use. KitGuru's 4K QD1 1 Thread test counts as RND4K Q1T1. A CrystalDiskMark result printed in IOPS is stored as IOPS x 4096 / 1,000,000 MB/s, the way CrystalDiskMark converts.

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Random 4K write at queue depth 1 (measured)iCrystalDiskMark RND4K Q1T1 write result from a reviewer. A CrystalDiskMark result printed in IOPS is stored as IOPS x 4096 / 1,000,000 MB/s, the way CrystalDiskMark converts.

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Write cache size (measured)iData written at full speed in one long sequential write on an empty drive before the speed drops.

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Write speed after the cache (measured)iWrite speed in the first state after the fast cache is full, when the drive writes straight to TLC or QLC. Tom's Hardware calls it TLC mode. The slower folding state and the lowest dip are not stored. Only from a long sequential write test.

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3DMark Storage BenchmarkiOverall score measured by a reviewer. Host and slot are in the source note. From StorageReview only. Tom's Hardware scores the same drive about 30 percent higher, so other reviewers are not mixed in.

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Highest temperature under load (measured)iHighest drive sensor reading in a sustained write test of 10 minutes or more, on the bare drive unless the row is a heatsink version. Short benchmark runs do not count. Heatsink, airflow and room temperature go in the source note.

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Idle power (measured)iReviewer's idle reading. Power-saving settings such as ASPM are in the source note. A value read from a chart image counts when the source note says "read from chart".

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Cooling and build

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HeatsinkiVersions sold. The base lists every version and each variant row lists its own. A water block or a cooler with a fan counts as a heatsink. A thermal pad or label alone is bare. A heatsink in the box that the buyer fits, as on the XPG MARS 980 BLADE, counts as with heatsink.

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Without heatsink1Maker product pagesilicon-power.com/product-detail/Ace_A55Read 15 October 2026The page shows one plain 2.5 inch case and lists no heatsink version.

RGB lightingiAny version sold has lighting the user can set. A status LED alone does not count. Leave it out when no version has lighting. The Heatsink rows show which version has it.

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Dust and water ratingiPublished IP rating of an external drive.

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Drop test heightiMaker-published tested height. Surface and conditions are in the source note.

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Security and software

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SecurityiFeatures the maker names for the drive. Encryption done by host software does not count. ATA Security passthrough counts as password protection.

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Software

Fanxiang SSD Toolbox3Retailer pageamazon.com/dp/B09XDJ673FRead 16 October 2026Product description FAQ names the latest FANXIANG SSD Toolbox, which reads drive status and offers disk cloning and system migration. The maker's drivers page offers a file named SSDmanagement-1.0.40 under SSD Management Software

SP ToolBox1Maker product pagesilicon-power.com/product-detail/Ace_A55Read 15 October 2026Free download of SP ToolBox for disk information, SMART report, wear extent and diagnostics. The datasheet says the performance test and secure erase features are for industrial SSDs only.

Compatibility

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PlatformsiPlatforms the maker names for this drive. A PS5 needs a heatsink on an internal drive. PC is for a maker that writes Client PCs or PC without naming an operating system. Handheld PCs go in Other with a source note.

Windows, macOS, Linux1Maker product pagefanxiangssd.com/products/internal-solid-state-drive-fanxiang-s101-1tb-ssdRead 16 October 2026Specifications table reads Windows 7, 8, 10, 11 and Mac OS 10.9 and later. The description adds Linux 2.6.33 or later and says laptops, desktops and all-in-one computers

PC (no OS named)1Maker product pagesilicon-power.com/product-detail/Ace_A55Read 15 October 2026Page title reads SP Ace A55 2.5" SATA SSD for Laptops & PCs. No operating system is named, so PC is stored

Dimensions and weight

2 of 2 differ

DimensionsiLength is the long side. Height is the thickness, including a fitted heatsink. As the maker publishes it. A maximum counts. Length is the long side even when the maker lists the width first.

Length100Width69.8Height7mm(3.9 × 2.7 × 0.3 in)3Retailer pageamazon.com/dp/B09XDJ673FRead 16 October 2026Same A+ image: Dimensions 100(L) x 69.8(W) x 7.0(H) mm

Length100Width69.9Height7mm(3.9 × 2.8 × 0.3 in)1Maker product pagesilicon-power.com/product-detail/Ace_A55Read 15 October 2026Dimensions row reads 100.0 x 69.9 x 7.0 mm. One value for every capacity.2Maker spec sheet (PDF)silicon-power.com/download-detail/edm-ace-a55Read 15 October 2026

WeightiDrive alone, with a heatsink when it is sold fitted. No cable and no packaging. As the maker publishes it. A maximum counts. Not a measured weight.

45g(1.6 oz)3Retailer pageamazon.com/dp/B09XDJ673FRead 16 October 2026Same A+ image: Weight about 45 g. The qualifier is approximate. Amazon's own item weight of 2.08 ounces is a shipping figure and is not used. Other 2.5-inch drives in the catalog weigh 33 to 63 g, so the M.2 peer median does not apply

63g(2.2 oz)1Maker product pagesilicon-power.com/product-detail/Ace_A55Read 15 October 2026Weight row reads 63g (max.). One value for every capacity. A 2.5 inch case weighs more than an M.2 drive.2Maker spec sheet (PDF)silicon-power.com/download-detail/edm-ace-a55Read 15 October 2026

In the box

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In the box

2.5-inch SATA SSD, Product box3Retailer pageamazon.com/dp/B09XDJ673FRead 16 October 2026Product description FAQ: after purchase you receive 1 x 2.5-inch SATA SSD and 1 x product box. The product does not include a SATA cable

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Cables includediCables supplied with an external drive.

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Links

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Product page

www.fanxiangssd.com/products/internal-solid-state-drive-fanxiang-s101-1tb-ssd1Maker product pagefanxiangssd.com/products/internal-solid-state-drive-fanxiang-s101-1tb-ssdRead 16 October 2026

www.silicon-power.com/product-detail/Ace_A551Maker product pagesilicon-power.com/product-detail/Ace_A55Read 15 October 2026

Spec sheet

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www.silicon-power.com/download-detail/edm-ace-a552Maker spec sheet (PDF)silicon-power.com/download-detail/edm-ace-a55Read 15 October 2026One-page eDM flyer issued Feb 13, 2026. It is the only datasheet on the product page. It has no controller, flash, DRAM, IOPS, temperature or TBW values.

Manual

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EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

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Warranty

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Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

3years1Maker product pagefanxiangssd.com/products/internal-solid-state-drive-fanxiang-s101-1tb-ssdRead 16 October 2026Gallery image shows a 3 years warranty badge and the description says a 3-year warranty period3Retailer pageamazon.com/dp/B09XDJ673FRead 16 October 2026Item details read Warranty Description 3 Year Manufacturer

3years1Maker product pagesilicon-power.com/product-detail/Ace_A55Read 15 October 20263-year limited warranty. The page says the warranty is based on the TBW or the warranty period.2Maker spec sheet (PDF)silicon-power.com/download-detail/edm-ace-a55Read 15 October 2026

Both are also in the API. Back to all SSDs.