SSDs / Compare

Kingston A400 vs Silicon Power Ace A55

A

Product A: Kingston

A400

23 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

AKingston A400

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.

SA400S37/240G, SA400S37/480G, SA400S37/960G1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Part Numbers table lists SA400S37/240G, SA400S37/480G and SA400S37/960G for the 2.5 inch standalone drive. The 2022 US datasheet also lists SA400S37/120G and the M.2 2280 model SA400M8. The M.2 model is a different form factor and is not stored here. A 1920GB model, SA400S37/1920G, is sold by retailers but is not on this datasheet2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 20262022 US datasheet MKD-393.5US lists SA400S37/120G, /240G, /480G and /960G, and the M.2 parts SA400M8/240G and SA400M8/480G. The 120GB is not on the 2024 datasheet and is not stored

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

740617261219, 740617263442, 7406172773576Retailer pagescan.co.uk/products/240gb-kingston-a400-ssd-25-sata-iii-6-g-bs-up-to-500mb-s-read-up-to-350mb-s-write-speedRead 15 October 2026GTIN row reads 0740617261219, which is UPC 740617261219, for SA400S37/240G7Retailer pagescan.co.uk/products/480gb-kingston-a400-25-ssd-7mm-sata-iii-6gb-s-3d-nand-tlc-500mb-s-read-450mb-s-write-retailRead 15 October 2026GTIN listed as 740617263442 for SA400S37/480G8Retailer pagescan.co.uk/products/960gb-kingston-a400-25-ssd-sata-iii-6gb-s-2ch-tlc-500mb-s-read-450mb-s-write-retailRead 15 October 2026GTIN row reads 0740617277357, which is UPC 740617277357, for SA400S37/960G. A search result for an eBay Germany listing shows the same EAN

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.

3 April 20175Press articleweekly.ascii.jp/elem/000/001/462/1462208Read 15 October 20263 April 2017, the Japan announcement. No global Kingston press release was readable

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Status

Available1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026The current Kingston datasheet and product page title cover the drive, and Kingston's May 2026 press release marks 100 million units shipped4Press articlethemachinemaker.com/news/kingston-surpasses-100-million-a400-sata-ssd-shipments-worldwideRead 15 October 2026Trade coverage dated 3 June 2026 of Kingston's press release that more than 100 million A400 SATA SSDs have shipped since the 2017 launch. Kingston's own release is behind a Cloudflare challenge

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

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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 spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Form factor row reads 2.5 inch. Key Features says a 2.5 inch 7 mm form factor

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.

240, 480, 960GB1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Capacities row reads 240GB, 480GB, 960GB. Kingston's flash guide footnote says part of the listed capacity is used for formatting. The 2022 US datasheet also lists 120GB2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026Lists 120GB, 240GB, 480GB and 960GB. The 120GB model is left out because the 2024 datasheet no longer lists it

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 spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Interface row reads SATA Rev. 3.0 (6Gb/s) with backwards compatibility to SATA Rev. 2.0 (3Gb/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.

TLC5Press articleweekly.ascii.jp/elem/000/001/462/1462208Read 15 October 2026Article describes a 2-channel controller and TLC NAND, and says the controller and NAND used to meet the specs may vary with production date6Retailer pagescan.co.uk/products/240gb-kingston-a400-ssd-25-sata-iii-6-g-bs-up-to-500mb-s-read-up-to-350mb-s-write-speedRead 15 October 2026Flash Memory Type row reads TLC7Retailer pagescan.co.uk/products/480gb-kingston-a400-25-ssd-7mm-sata-iii-6gb-s-3d-nand-tlc-500mb-s-read-450mb-s-write-retailRead 15 October 2026Flash Memory Type row reads TLC, with 3D NAND in the overview8Retailer pagescan.co.uk/products/960gb-kingston-a400-25-ssd-sata-iii-6gb-s-2ch-tlc-500mb-s-read-450mb-s-write-retailRead 15 October 2026Flash Memory Type row reads 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.

None6Retailer pagescan.co.uk/products/240gb-kingston-a400-ssd-25-sata-iii-6-g-bs-up-to-500mb-s-read-up-to-350mb-s-write-speedRead 15 October 2026DRAM Cache Memory row reads N/A. The controller row reads 2Ch. SATA has no host memory buffer, so the value is none7Retailer pagescan.co.uk/products/480gb-kingston-a400-25-ssd-7mm-sata-iii-6gb-s-3d-nand-tlc-500mb-s-read-450mb-s-write-retailRead 15 October 2026DRAM Cache Memory row reads N/A8Retailer pagescan.co.uk/products/960gb-kingston-a400-25-ssd-sata-iii-6gb-s-2ch-tlc-500mb-s-read-450mb-s-write-retailRead 15 October 2026DRAM Cache Memory row reads N/A9Retailer pageinet.se/produkt/4300499/kingston-a400-480gb-2-5Read 15 October 2026A customer Q&A on the 480GB page, written for the 120GB model, says the A400 has no DRAM cache and uses a pseudo-SLC cache for write speed. Memory type row reads TLC

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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

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

500MB/s1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Baseline performance, data transfer (ATTO): up to 500 MB/s read for 240GB, 480GB and 960GB. Footnote 1: out-of-box performance on a SATA Rev. 3.0 motherboard. Host not named2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026Same ATTO figures as the 2024 datasheet: up to 500 MB/s read

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.

450MB/s1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026ATTO: 350 MB/s (240GB), 450 MB/s (480GB), 450 MB/s (960GB). Same test conditions as read. Base value is the 960GB model, the largest capacity on the datasheet2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026Same ATTO figures: 350 MB/s (240GB) and 450 MB/s (480GB and 960GB). 120GB is 320 MB/s

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.

300TB1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026TBW row: 240GB 80 TB, 480GB 160 TB, 960GB 300 TB. Footnote 4: derived from the JEDEC workload JESD219A. Base value is the 960GB model2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026Same TBW: 80 TB, 160 TB and 300 TB. 120GB is 40 TB

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.

2,000,000h1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Life expectancy row reads 2 million hours MTBF. The 2022 US and Latin America datasheets (MKD-393.5US) read 1 million hours MTBF, and retailer copies also say 1,000,000. The newest datasheet is stored2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026Life expectancy 1 million hours MTBF. This disagrees with the 2024 datasheet, which reads 2 million hours. The 2024 value is stored

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°C1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Operating temperature 0 to 70 C. Storage range of -40 to 85 C is not stored2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 20260 to 70 C, same as the 2024 datasheet

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.

1.535W1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Power consumption row reads 0.195W idle / 0.279W avg / 0.642W (MAX) read / 1.535W (MAX) write. The higher max figure is stored, 1.535 W for write. The max read figure is 0.642 W. The datasheet gives no test tool, so the figures are as published2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026Same power row: 0.642 W max read and 1.535 W max write

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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.

279mW1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 20260.279W Avg is stored as 279 mW. The A400 datasheet does not name the workload behind the average. The 0.195 W idle figure is not stored, since the datasheet names no low-power state2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026Same 0.279 W avg figure

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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

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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

Kingston SSD Manager1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Footnote 3 says the SSD Life Remaining value can be read with Kingston SSD Manager

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.

PC (no OS named)1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Text says the drive is designed for desktop and notebook computer workloads and not for server environments. Stored as PC, since no operating system is named

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

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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.

Length100Width69.9Height7mm(3.9 × 2.8 × 0.3 in)1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Dimensions row reads 100.0mm x 69.9mm x 7.0mm (2.5 inch)2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026100.0mm x 69.9mm x 7.0mm for the 2.5 inch drive

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.

41.9g(1.5 oz)1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Weight row: 41 g (240-480GB), 41.9 g (960GB). Base value is the 960GB model2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 202641g (240-480GB) and 41.9g (960GB). 39 g for the 120GB 2.5 inch

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

None of 2 known

In the box

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Cables includediCables supplied with an external drive.

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Links

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Product page

www.kingston.com/en/ssd/a400-solid-state-drive3Maker product pagekingston.com/en/ssd/a400-solid-state-driveRead 15 October 2026The page returned a Cloudflare challenge on 2026-10-15, so it was not read. The URL is the maker's product page for the A400, as shown in search results with the title A400 Solid State Drive - 240GB-960GB, which matches the 2024 datasheet title

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

Spec sheet

www.kingston.com/datasheets/sa400_en.pdf1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Kingston datasheet MKD-01032024, PDF created March 2024, titled A400 Solid State Drive - 240GB-960GB. It is the current global datasheet

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

Not available

Not available

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.

Not available

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Warranty

0 of 1 differ

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 spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Limited 3-year warranty with free technical support. Footnote 3 adds that the warranty runs 3 years or until Life Remaining is used up. The datasheet is global and names no market2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026Limited 3-year warranty with free technical support

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.