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Samsung 870 EVO vs Silicon Power Ace A55

A

Product A: Samsung

870 EVO

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B

Product B: Silicon Power

Ace A55

19 of 63 known

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Only differences

ASamsung 870 EVO

BSilicon Power Ace A55

General

5 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.

MZ-77E250BW, MZ-77E250B/AM, MZ-77E250B/EU, MZ-77E250B/CN, MZ-77E250B/KR, MZ-77E500BW, MZ-77E500B/AM, MZ-77E500B/EU, MZ-77E500B/CN, MZ-77E500B/KR, MZ-77E1T0BW, MZ-77E1T0B/AM, MZ-77E1T0B/EU, MZ-77E1T0B/CN, MZ-77E2T0BW, MZ-77E2T0B/AM, MZ-77E2T0B/EU, MZ-77E2T0B/CN, MZ-77E4T0BW, MZ-77E4T0B/AM, MZ-77E4T0B/EU, MZ-77E4T0B/CN, MZ-77E8T0B/AM, MZ-77E8T0B/EU1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Product lineup table lists the model codes with the suffixes BW, B/AM, B/EU and B/CN for every capacity, and B/KR for 250GB and 500GB. The 8TB codes come from the Samsung pages below7Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-8tb-sata-3-2-5-ssd-mz-77e8t0b-euRead 15 October 2026The page URL and title give MZ-77E8T0B/EU. The Samsung US page gives MZ-77E8T0B/AM. No BW code was found for 8TB8Maker product pagesamsung.com/us/memory-storage/sata-ssd/870-evo-sata-2-5-ssd-1tb-sku-mz-77e1t0b-amRead 15 October 2026The page lists MZ-77E1T0 / MZ-77E1T0B/AM for 1TB and the 8TB SKU as MZ-77E8T0B/AM

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

8806090545931, 8806090545924, 8806090545917, 8806090545900, 880609054589416Retailer pagecompuram.biz/ssd/client/sata/samsung-870-evo-ssd/mz-77e1t0b-eu-m10e95.htmRead 15 October 2026GTIN row reads 8806090545917 for MZ-77E1T0B/EU. The 2TB page (mz-77e2t0b-eu-m10e96) reads 8806090545900 and the 4TB page (mz-77e4t0b-eu-m10e98) reads 880609054589417Retailer pageindustry-electronics.de/samsung/mz-77e250b-eu-ssd-sata-2-5-250gb-870-evo-series-druckansicht-539215.htmRead 15 October 2026EAN-Code 8806090545931 for MZ-77E250B/EU18Retailer pageindustry-electronics.de/samsung/mz-77e500b-eu-ssd-500gb-2-5-6.3cm-sataiii-870-evo-retail-druckansicht-539209.htmRead 15 October 2026EAN-Code 8806090545924 for MZ-77E500B/EU

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.

19 January 20219Press releasenews.samsung.com/us/storage-memory-sata-ssd-870-evoRead 15 October 2026Samsung Electronics America announced the 870 EVO on 2021-01-19 (post date in the Samsung US newsroom)

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Status

Available8Maker product pagesamsung.com/us/memory-storage/sata-ssd/870-evo-sata-2-5-ssd-1tb-sku-mz-77e1t0b-amRead 15 October 2026Samsung US sells the drive in 2026 and the page highlights capacities from 250GB to 8TB and up to 4,800 TBW

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.

$249.999Press releasenews.samsung.com/us/storage-memory-sata-ssd-870-evoRead 15 October 2026The 870 EVO is available in 250GB for $39.99, 500GB for $69.99, 1TB for $129.99, 2TB for $249.99 and 4TB for $479.99. These are US launch prices. Tax is not included

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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.

€269.910Press releasenews.samsung.com/de/samsung-veroeffentlicht-ssd-870-evoRead 15 October 2026German press release: recommended retail prices as of January 2021 including 19 percent VAT. 250GB 39.90 EUR, 500GB 69.90 EUR, 1TB 139.90 EUR, 2TB 269.90 EUR and 4TB 549.90 EUR. The release says the 870 EVO is available from January 202111Press articlepcgameshardware.de/SSD-Hardware-255552/News/Samsung-870-Evo-SATA-8-TB-Preis-Release-1523415Read 15 October 2026PC Games Hardware update of 2026-04-09 says Samsung officially announced the 870 EVO 8TB on 2026-04-08 with a recommended retail price of 2,640.99 EUR in Germany. The article does not say whether VAT is included, and the street price was about 1,400 EUR. The figure is stored as reported

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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

Black8Maker product pagesamsung.com/us/memory-storage/sata-ssd/870-evo-sata-2-5-ssd-1tb-sku-mz-77e1t0b-amRead 15 October 2026The page names the gallery images 870 EVO SATA 2.5 inch SSD 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 spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Form Factor row reads 2.5 inch

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.

250 GB, 500 GB, 1 TB, 2 TB, 4 TB, 8 TB1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Capacity row lists 250GB, 500GB, 1TB, 2TB and 4TB. Footnote 1 says 1GB equals 1,000,000,000 bytes7Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-8tb-sata-3-2-5-ssd-mz-77e8t0b-euRead 15 October 2026Capacity row reads 8 TB (1 GB = 1 Billion byte by IDEMA). Samsung says the 870 EVO is available in capacities up to 8TB8Maker product pagesamsung.com/us/memory-storage/sata-ssd/870-evo-sata-2-5-ssd-1tb-sku-mz-77e1t0b-amRead 15 October 2026Highlights: Storage capacities from 250GB to 8TB11Press articlepcgameshardware.de/SSD-Hardware-255552/News/Samsung-870-Evo-SATA-8-TB-Preis-Release-1523415Read 15 October 2026The 8TB model was first spotted in a Geizhals listing in March 2026, then announced by Samsung on 2026-04-08

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)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Interface row reads SATA 6 Gb/s, compatible with SATA 3 Gb/s and 1.5 Gb/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.

Samsung MKX1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Controller row reads Samsung MKX Controller for all capacities2Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-sata-3-2-5-ssd-mz-77e1t0b-euRead 15 October 2026Controller row reads Samsung MKX Controller12Reviewtomshardware.com/reviews/samsung-870-evo-sata-ssd-review-the-best-just-got-betterRead 15 October 2026Review: the MKX Metis SATA 6Gbps controller with eight NAND channels, the same one as in the 870 QVO. The specs table agrees with the maker's MKX name

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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.

TLC1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026NAND Flash Memory row reads Samsung V-NAND 3bit MLC. Three bits per cell is TLC

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

Samsung V-NAND V6 TLC12Reviewtomshardware.com/reviews/samsung-870-evo-sata-ssd-review-the-best-just-got-betterRead 15 October 2026Review: Samsung's 6th-gen 512Gb 128-layer V-NAND TLC. The specs table lists Samsung 128L TLC for all capacities13Reviewkitguru.net/components/ssd-drives/simon-crisp/samsung-ssd-870-evo-1tb-review/all/1Read 15 October 2026KitGuru calls it Samsung 6th generation 1xx layer V-NAND 3-bit MLC (TLC) with the MKX controller and LPDDR4 cache

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

12812Reviewtomshardware.com/reviews/samsung-870-evo-sata-ssd-review-the-best-just-got-betterRead 15 October 2026Review and specs table both say 128-layer. KitGuru quotes Samsung's description of a 136-layer mold stack for the same flash, so 128 is the layer count of memory cells as Tom's states it13Reviewkitguru.net/components/ssd-drives/simon-crisp/samsung-ssd-870-evo-1tb-review/all/1Read 15 October 2026KitGuru says Samsung did not state a layer count and quotes a 136-layer mold stack. Tom's Hardware gives 128 layers, which is stored

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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.

DRAM1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026DRAM Cache Memory row lists LPDDR4 for every capacity12Reviewtomshardware.com/reviews/samsung-870-evo-sata-ssd-review-the-best-just-got-betterRead 15 October 2026Review opened a 1TB and a 4TB sample and found Samsung LPDDR4 next to the controller, 1GB on the 1TB and 4GB on the 4TB

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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.

2GB1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026DRAM Cache Memory row: 512MB LPDDR4 (250GB and 500GB), 1GB (1TB), 2GB (2TB), 4GB (4TB). The 8GB figure for 8TB is on the Samsung UK 8TB page2Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-sata-3-2-5-ssd-mz-77e1t0b-euRead 15 October 2026Cache Memory row reads Samsung 1 GB Low Power DDR4 SDRAM7Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-8tb-sata-3-2-5-ssd-mz-77e8t0b-euRead 15 October 2026Cache Memory row reads 8GB LPDDR4. The Storage Memory row reads Samsung V-NAND TLC and the Controller row reads Samsung in-house Controller, without the MKX name

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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.

560MB/s1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Sequential Read 560 MB/s for all capacities. Footnote 2: sequential figures use CrystalDiskMark v5.0.2 on an Intel Core i7 at 4.00 GHz (printed as i7-470K), DDR3 1600 MHz 8GB, Windows 10 Pro 64-bit and an ASUS Z97 PRO board

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.

530MB/s1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Sequential Write 530 MB/s for all capacities. Footnote 3: measured with Intelligent TurboWrite. After the TurboWrite region the speed is 300 MB/s (250GB and 500GB) or 530 MB/s (1TB, 2TB and 4TB)

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.

98,000IOPS1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 20264KB Random Read (QD32) up to 98,000 IOPS. The QD1 figure is 13,000 IOPS. Footnote 2: random figures use IOmeter 1.1.0 on the same test system

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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.

88,000IOPS1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 20264KB Random Write (QD32) up to 88,000 IOPS. The QD1 figure is 36,000 IOPS

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Endurance and reliability

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

1,200TB1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026TBW row: 150, 300, 600, 1,200 and 2,400 TB for 250GB to 4TB. Footnote 5: tested to the JESD218 standard. Footnote 8: the warranty ends at 5 years or the TBW, whichever comes first7Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-8tb-sata-3-2-5-ssd-mz-77e8t0b-euRead 15 October 2026Warranty row: 5 Years Limited Warranty or 4,800 TBW. The footnote lists 150 to 4,800 TBW for 250GB to 8TB

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.

1,500,000h1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026MTBF 1.5 million hours for every capacity

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)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Operating temperature 0 C to 70 C. The non-operating range of -40 C 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.

2.2W1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Active (Avg.) Read/Write: 2.0W/2.2W (250GB and 500GB), 2.0W/2.5W (1TB), 2.2W/2.5W (2TB and 4TB). Footnote 4: measured with IOmeter 1.1.0 on an Intel Core i7-7700K at 4.2GHz, Samsung DDR4 16GB, a Gigabyte GA-Z270X board and Windows 10 Pro7Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-8tb-sata-3-2-5-ssd-mz-77e8t0b-euRead 15 October 2026Average Power Consumption (system level): Read 2.2 W and Write 2.6 W. Samsung's 8TB page gives no test conditions

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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.

2.5W1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Active (Avg.) write figure from the same row7Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-8tb-sata-3-2-5-ssd-mz-77e8t0b-euRead 15 October 2026Average write figure of 2.6 W from the same row

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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.

4.5W2Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-sata-3-2-5-ssd-mz-77e1t0b-euRead 15 October 2026Average Power Consumption (system level) row: Average 2.5 W, Maximum 4.0 W (burst mode) for 1TB. Samsung gives no read and write split for the maximum, so the maximum is stored in the max field3Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-sata-3-2-5-ssd-mz-77e250b-euRead 15 October 2026Average 2.2 W, Maximum 3.5 W (burst mode) for 250GB4Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-sata-3-2-5-ssd-mz-77e500b-euRead 15 October 2026Average 2.2 W, Maximum 3.5 W (burst mode) for 500GB5Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-sata-3-2-5-ssd-mz-77e2t0b-euRead 15 October 2026Average 2.5 W, Maximum 4.5 W (burst mode) for 2TB. This is the base value6Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-sata-3-2-5-ssd-mz-77e4t0b-euRead 15 October 2026Average 2.5 W, Maximum 5.0 W (burst mode) for 4TB

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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.

35mW1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Idle with DIPM on: 30 mW (250GB, 500GB and 1TB) and 35 mW (2TB and 4TB). DIPM is the SATA link power management that allows the Slumber state, so it is stored as low-power idle7Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-8tb-sata-3-2-5-ssd-mz-77e8t0b-euRead 15 October 2026Power consumption (Idle): Max. 40 mW. The page does not name DIPM. The 250GB to 1TB pages give Max. 30 mW and the data sheet gives 30 mW with DIPM on, so the same kind of figure is assumed

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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.

4.5mW1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Devslp row: 2.5 mW (250GB and 500GB), 3.0 mW (1TB), 4.5 mW (2TB) and 6.5 mW (4TB). Devslp is the SATA DevSleep state

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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.

AES 256-bit hardware encryption, TCG Opal 2.0, IEEE 1667 (eDrive)1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Data Security row: AES 256-bit Full Disk Encryption, TCG/Opal V2.0 and Encrypted Drive (IEEE1667)

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Software

Samsung Magician2Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-sata-3-2-5-ssd-mz-77e1t0b-euRead 15 October 2026Management SW row: Magician Software for SSD management and Data Migration Software for SSD upgrade9Press releasenews.samsung.com/us/storage-memory-sata-ssd-870-evoRead 15 October 2026The spec table lists Samsung Magician as 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.

PC (no OS named)1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Usage application row reads Client PCs. No operating system is named, so PC is stored

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.

Length100Width69.85Height6.8mm(3.9 × 2.8 × 0.3 in)1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Dimensions row reads 100 x 69.85 x 6.8 (mm). The row does not name the axes, so 100 is the length, 69.85 the width and 6.8 the thickness

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.

46g(1.6 oz)2Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-sata-3-2-5-ssd-mz-77e1t0b-euRead 15 October 2026Full specifications, Weight row: Approx. 45.0g for the 1TB model3Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-sata-3-2-5-ssd-mz-77e250b-euRead 15 October 2026Weight row: Approx. 45.0g for the 250GB model4Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-sata-3-2-5-ssd-mz-77e500b-euRead 15 October 2026Weight row: Approx. 45.0g for the 500GB model5Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-sata-3-2-5-ssd-mz-77e2t0b-euRead 15 October 2026Weight row: Approx. 46.0g for the 2TB model. This is the base value6Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-sata-3-2-5-ssd-mz-77e4t0b-euRead 15 October 2026Weight row: Approx. 48.0g for the 4TB model7Maker product pagesamsung.com/uk/business/memory-storage/sata-ssd/870-evo-8tb-sata-3-2-5-ssd-mz-77e8t0b-euRead 15 October 2026Weight row: Approx. 48.0g

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

Samsung SSD 870 EVO 250GB, Samsung SSD 870 EVO 500GB, Samsung SSD 870 EVO 1TB, Samsung SSD 870 EVO 2TB, Samsung SSD 870 EVO 4TB, Warranty Statement1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Product lineup table, Box Contents column: the drive of that capacity and a Warranty Statement. The base lists every box, and each row lists its own

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Cables includediCables supplied with an external drive.

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Links

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Product page

www.samsung.com/us/memory-storage/sata-ssd/870-evo-sata-2-5-ssd-1tb-sku-mz-77e1t0b-am8Maker product pagesamsung.com/us/memory-storage/sata-ssd/870-evo-sata-2-5-ssd-1tb-sku-mz-77e1t0b-amRead 15 October 2026Samsung US product page of the 1TB model. It lists 250GB, 500GB, 1TB, 2TB, 4TB and 8TB

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

Spec sheet

download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdf1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Samsung V-NAND SSD 870 EVO 2021 Data Sheet, Revision 1.1, PDF created 2021-01-06. Revision history: 1.0 initial release in November 2020, 1.1 in January 2021. A later copy named Rev1.1_230509 has the same text. It covers 250GB to 4TB and not the 8TB model

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.

5years1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_870_EVO_Data_Sheet_Rev1.1.pdfRead 15 October 2026Warranty period 5 year limited. The data sheet names no market

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.