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Samsung 990 PRO vs Seagate Storage Expansion Card for Xbox Series X|S

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Product A: Samsung

990 PRO

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Product B: Seagate

Storage Expansion Card for Xbox Series X|S

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ASamsung 990 PRO

BSeagate Storage Expansion Card for Xbox Series X|S

General

6 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-V9P1T0BW, MZ-V9P1T0B/AM, MZ-V9P2T0BW, MZ-V9P2T0B/AM, MZ-V9P4T0BW, MZ-V9P4T0B/AM, MZ-V9P1T0CW, MZ-V9P1T0GW, MZ-V9P2T0CW, MZ-V9P2T0GW, MZ-V9P4T0CW, MZ-V9P4T0GW1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026Product lineup table: MZ-V9P1T0BW and MZ-V9P1T0B/AM (1TB), MZ-V9P2T0BW and MZ-V9P2T0B/AM (2TB), MZ-V9P4T0BW and MZ-V9P4T0B/AM (4TB). The heatsink data sheet lists the CW and GW codes2Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_with_heatsink_datasheet_rev.3.0.pdfRead 14 October 2026Heatsink model codes MZ-V9P1T0CW and MZ-V9P1T0GW, MZ-V9P2T0CW and MZ-V9P2T0GW, MZ-V9P4T0CW and MZ-V9P4T0GW, both listed under one box content for each capacity

STJR512400, STJR1000400, STJR2000400, STJR40004002Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 2026Specifications table: STJR1000400, STJR2000400 and STJR40004003Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-2-2412US-en_US.pdfRead 15 October 2026Seagate data sheet DS2081.2-2412US, the last one that lists the 512GB model STJR512400 with STJR1000400 and STJR20004004Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-4-2504US-en_US.pdfRead 15 October 2026Data sheet DS2081.4-2504US of April 2025 lists STJR1000400 and STJR2000400 only

GTIN / EAN

8806094215021, 8806094215038, 880609494720520Retailer pagealternate.de/SAMSUNG/990-PRO-2-TB-SSD/html/product/1864243Read 14 October 20262TB, model MZ-V9P2T0BW, EAN 880609421503821Retailer pageoffice-partner.de/samsung-990-pro-1tb-25133710Read 14 October 20261TB, manufacturer number MZ-V9P1T0BW, EAN 8806094215021. The same EAN is on pcinternational.co.za22Retailer pageebay.de/p/24063072662Read 14 October 20264TB, model MZ-V9P4T0BW, EAN 8806094947205 on the eBay product page. No GTIN found for the heatsink models, since listings of MZ-V9P2T0CW show several different EANs

763649170410, 8719706042659, 763649142950, 8719706023757, 763649170311, 8719706042550, 763649182376, 87197060452092Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 2026UPC and EAN rows. 1TB UPC 763649142950, EAN 8719706023757. 2TB UPC 763649170311, EAN 8719706042550. 4TB UPC 763649182376, EAN 8719706045209. The multi-pack UPCs are not stored3Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-2-2412US-en_US.pdfRead 15 October 2026512GB UPC 763649170410 and EAN 87197060426594Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-4-2504US-en_US.pdfRead 15 October 2026Same UPC and EAN values as the 2501 sheet

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

25 August 202210Press releasenews.samsung.com/global/samsung-electronics-unveils-high-performance-990-pro-ssd-optimized-for-gaming-and-creative-applicationsRead 14 October 2026Samsung global newsroom, Korea, August 25, 2022. Samsung Germany's release is dated 24.08.2022

24 September 20206Press releaseseagate.com/news/news-archive/the-new-seagate-storage-expansion-card-for-xbox-series-x-pr-masterRead 15 October 2026Press release dated September 24, 2020

Status

Available3Maker product pagesamsung.com/us/memory-storage/nvme-ssd/990-pro-pcie-4-0-nvme-ssd-1tb-sku-mz-v9p2t0b-amRead 14 October 2026Samsung US page lists 1TB, 2TB and 4TB and a heatsink option. It shows current prices, which are not used

Available11Retailer pageamazon.com/dp/B08K48F6QZRead 15 October 2026Amazon US listing for the 1TB, STJR1000400, with 10,228 ratings and rank 117 in External Solid State Drives on 2026-10-15. Seagate's own store shows no stock, so the status rests on the retail listings. The listing's weight of 30 g and its USB connectivity entry are not stored

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

Samsung 980 PRO23Reviewtomshardware.com/pc-components/42-percent-slashed-of-samsungs-990-pro-ssd-2tb-now-usd369-usd270-savings-brings-one-of-the-fastest-pcie-4-0-ssds-to-its-lowest-price-in-monthsRead 23 October 2026Tom's Hardware says the Samsung 990 Pro is the successor to the 980 Pro.24Reviewkitguru.net/components/ssd-drives/simon-crisp/samsung-990-pro-2tb-review/all/1Read 23 October 2026KitGuru says the Samsung 990 Pro takes over from the previous high-end drive, the SSD 980 Pro.

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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.

Samsung 9100 PRO25Reviewtechradar.com/pro/finally-samsungs-first-pcie-5-0-ssd-that-you-can-actually-buy-is-here-after-a-nearly-two-year-wait-meet-the-9100-proRead 23 October 2026TechRadar calls the Samsung 9100 Pro the successor to the 990 Pro.

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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.

$289.9913Reviewtomshardware.com/reviews/samsung-990-pro-ssd-reviewRead 14 October 2026US launch prices: 1TB $169.99, 2TB $289.99. The heatsink and RGB version adds $20: 1TB $189.99, 2TB $309.99. SamMobile reported the same US prices. Samsung's global press release named $179 and $309 for the bare drives15Reviewtomshardware.com/reviews/samsung-990-pro-4tb-ssd-reviewRead 14 October 20264TB launch pricing $344.99 bare and $354.99 with heatsink. StorageReview and PCWorld agree19Reviewstoragereview.com/review/samsung-990-pro-4tb-ssd-reviewRead 14 October 2026StorageReview names an MSRP of $344.99 for the 4TB and $354.99 with heatsink

$399.996Press releaseseagate.com/news/news-archive/the-new-seagate-storage-expansion-card-for-xbox-series-x-pr-masterRead 15 October 20261TB at $219.99, US7Press releasenews.xbox.com/en-usRead 15 October 2026Xbox Wire post of October 21, 2021: the 512GB card is $139.99 USD with launch in mid-November and the 2TB card is $399.99 USD with launch in early December. US only. The base price is the 2TB model8Press releaseseagate.com/ca/en/stories/articles/seagate-unveils-4tb-storage-expansion-card-for-xbox-series-x-s-the-ideal-storage-upgrade-for-players-prRead 15 October 2026Press release of June 9, 2025: the 4TB card is now available for $499.99 at the Seagate store and Best Buy. US

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.

€324.912Press releasenews.samsung.com/de/ssd-990-pro-fur-gamer-und-kreative/1000Read 14 October 2026Samsung Germany, 24.08.2022, unverbindliche Preisempfehlung incl. VAT: 990 PRO 1TB 174.90 EUR, 2TB 324.90 EUR. No euro price found for 4TB or the heatsink versions

From €239.992Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 20263Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-2-2412US-en_US.pdfRead 15 October 20266Press releaseseagate.com/news/news-archive/the-new-seagate-storage-expansion-card-for-xbox-series-x-pr-masterRead 15 October 20267Press releasenews.xbox.com/en-usRead 15 October 20268Press releaseseagate.com/ca/en/stories/articles/seagate-unveils-4tb-storage-expansion-card-for-xbox-series-x-s-the-ideal-storage-upgrade-for-players-prRead 15 October 20269Press articlewinfuture.de/news,118473.htmlRead 15 October 202612Press articlegamesbeat.com/xbox-series-x-seagate-expansion-card-teardownRead 21 October 202613Press articlethesixthaxis.com/2020/10/16/xbox-series-x-ssd-expansion-card-teardown-4d-nand-phison-e19t-pcie-speedRead 21 October 202614Press articletweaktown.com/news/75722/xbox-series-ssd-sk-hynix-4d-tlc-nand-phison-e19-memory-controller/index.htmlRead 21 October 2026

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

Black3Maker product pagesamsung.com/us/memory-storage/nvme-ssd/990-pro-pcie-4-0-nvme-ssd-1tb-sku-mz-v9p2t0b-amRead 14 October 2026Colour: Black4Maker product pagesamsung.com/uk/memory-storage/nvme-ssd/990-pro-2tb-nvme-pcie-gen-4-mz-v9p2t0bwRead 14 October 2026Colour: 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.

M.2 22801Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026

Xbox expansion card1Maker product pageseagate.com/products/gaming-drives/xbox-gaming/storage-expansion-for-xbox-series-xRead 15 October 2026The page says the card installs in the expansion storage slot of the console

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.

1 TB, 2 TB, 4 TB1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026

512 GB, 1 TB, 2 TB, 4 TB2Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 2026Footnote: one gigabyte equals one billion bytes and one terabyte equals one trillion bytes

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.

PCIe NVMe1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026PCIe Gen 4.0 x4, NVMe 2.0. Footnote 2 says the drive is backward compatible with PCIe 3.0

PCIe NVMe10Reviewstoragereview.com/review/seagate-storage-expansion-card-for-xbox-series-xs-reviewRead 15 October 2026Review of the 1TB card dated December 9, 2020. The spec table names the flash as Custom PCIe Gen4x2 NVMe, and Seagate's 4TB review table names PCIe Gen4 NVMe. The card connects through the console's proprietary expansion port, so Seagate and the Xbox pages name no standard interface

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.

41Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026

410Reviewstoragereview.com/review/seagate-storage-expansion-card-for-xbox-series-xs-reviewRead 15 October 2026Spec table row reads Custom PCIe Gen4x2 NVMe, so generation 4. Seagate itself publishes no PCIe generation

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

41Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026

210Reviewstoragereview.com/review/seagate-storage-expansion-card-for-xbox-series-xs-reviewRead 15 October 2026Same row: Gen4x2, so two lanes. Retailer listings such as Best Buy also say PCIe Gen 4 x2

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

2.01Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026

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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 Pascal13Reviewtomshardware.com/reviews/samsung-990-pro-ssd-reviewRead 14 October 2026Specs table lists Samsung Pascal for all capacities, an 8 nm ARM-based controller. Maker says only Samsung in-house controller17Reviewkitguru.net/components/ssd-drives/simon-crisp/samsung-990-pro-2tb-reviewRead 14 October 2026Names Samsung's Pascal controller, built on an 8 nm process

Phison E19T12Press articlegamesbeat.com/xbox-series-x-seagate-expansion-card-teardownRead 21 October 2026GamesBeat (VentureBeat) teardown of 15 October 2020, updated 20 June 2025, of a 1TB Seagate card the author received from Microsoft with the preview Xbox Series X hardware. The text reads: the controller is the Phison E19T PCIe Gen 4 controller. No other capacity was opened, so the controller of the 512GB, 2TB and 4TB cards is not confirmed and Seagate names none13Press articlethesixthaxis.com/2020/10/16/xbox-series-x-ssd-expansion-card-teardown-4d-nand-phison-e19t-pcie-speedRead 21 October 2026TheSixthAxis report of 16 October 2020 on the same VentureBeat teardown of the 1TB card: it combines a Phison E19T SSD controller with a single 1TB chip of SK Hynix's 4D NAND14Press articletweaktown.com/news/75722/xbox-series-ssd-sk-hynix-4d-tlc-nand-phison-e19-memory-controller/index.htmlRead 21 October 2026TweakTown news of 16 October 2020 on the GamesBeat teardown: the SSD card uses Phison's E19T memory controller

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_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026

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

Samsung V-NAND V7 TLC11Press releasenews.samsung.com/global/samsung-electronics-4tb-ssd-990-pro-series-brings-ultimate-performance-and-capacity-for-gamers-and-creatorsRead 14 October 2026Korea, September 7, 2023: the 4TB 990 PRO is built on eighth-generation V-NAND (V8) with 1Tb dies13Reviewtomshardware.com/reviews/samsung-990-pro-ssd-reviewRead 14 October 20261TB and 2TB at launch use Samsung's 176-layer V7 TLC, chip code K9DVGY8JRD-DCK0. Tom's Hardware's 9100 PRO review says the 236-layer V8 flash later made its way onto the smaller 990 PRO SKUs, so newer 1TB and 2TB units can differ15Reviewtomshardware.com/reviews/samsung-990-pro-4tb-ssd-reviewRead 14 October 2026Specs table reads 236-Layer (V8) V-NAND TLC for the 4TB, with the Samsung Pascal controller

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

17611Press releasenews.samsung.com/global/samsung-electronics-4tb-ssd-990-pro-series-brings-ultimate-performance-and-capacity-for-gamers-and-creatorsRead 14 October 2026Press release says V8. Tom's Hardware gives 236 layers for the 4TB13Reviewtomshardware.com/reviews/samsung-990-pro-ssd-reviewRead 14 October 2026176 layers for the 1TB and 2TB reviewed at launch15Reviewtomshardware.com/reviews/samsung-990-pro-4tb-ssd-reviewRead 14 October 2026236 layers for the 4TB17Reviewkitguru.net/components/ssd-drives/simon-crisp/samsung-990-pro-2tb-reviewRead 14 October 2026Two packages of Samsung's 7th generation 176-layer TLC V-NAND, coded K9DVGY8JRD-DCK0, 512Gb dies, on the 2TB

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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_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026

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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_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026DRAM Cache Memory row: 1GB, 2GB and 4GB LPDDR4 by capacity

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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.

Single-sided11Press releasenews.samsung.com/global/samsung-electronics-4tb-ssd-990-pro-series-brings-ultimate-performance-and-capacity-for-gamers-and-creatorsRead 14 October 2026The 4TB is a single-sided M.2 form factor. Available early October 2023, 1TB and 2TB already on sale15Reviewtomshardware.com/reviews/samsung-990-pro-4tb-ssd-reviewRead 14 October 2026The 4TB stays single-sided with two NAND packages17Reviewkitguru.net/components/ssd-drives/simon-crisp/samsung-990-pro-2tb-reviewRead 14 October 2026Reviewer says the 2TB is built on a single-sided M.2 2280 format19Reviewstoragereview.com/review/samsung-990-pro-4tb-ssd-reviewRead 14 October 2026Text on the 4TB reads: like the other capacities, the single-sided M.2 form factor

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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.

7,450MB/s1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 20267,450 MB/s on all capacities. IOmeter 1.1.0 on AMD Ryzen 7 5800X, ASRock X570 Taichi, DDR4-3600 2x16GB, Windows 10 Pro 64-bit, PCIe 4.0 x4, secondary drive in a fan-cooled desktop

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

6,900MB/s1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 20266,900 MB/s on all capacities, measured with Intelligent TurboWrite active, so inside the fast write cache

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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.

1,400,000IOPS1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026QD32, 16 threads: 1,200K (1TB), 1,400K (2TB), 1,600K (4TB). The datasheet also lists QD1, 1 thread: 22K read and 80K write, which are not stored. The KitGuru review text names 1,550K for reads and 1,400K for writes, which swaps the two figures

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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.

1,550,000IOPS1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026QD32, 16 threads: 1,550K on all capacities

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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_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026600 TB (1TB), 1,200 TB (2TB), 2,400 TB (4TB). Warranty covers 5 years or the TBW, whichever comes first

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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_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026Published as MTBF, 1.5 million hours

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

Min0Max70°C1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 20260 to 70 C, measured by S.M.A.R.T. temperature, proper airflow recommended. The non-operating range of -40 to 85 C is not stored

Min5Max35°C2Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 2026Notes row reads 5-35 degree C. The sheet gives no storage range3Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-2-2412US-en_US.pdfRead 15 October 20265-35 degree C, the same as the newer sheets

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.

6.1W1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026Active average, IOmeter 1.1.0 on AMD Ryzen 7 5800X, ASRock X570 Taichi, Windows 10 Pro: 5.5 W (1TB), 6.1 W (2TB), 6.5 W (4TB). Rev 2.0 values, which replace the Rev 1.0 values of 5.4 W and 5.8 W for 1TB and 2TB

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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.

5.5W1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 20265.2 W (1TB), 5.5 W (2TB), 5.7 W (4TB). Rev 1.0 listed 5.0 W and 5.1 W

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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.

8.5W4Maker product pagesamsung.com/uk/memory-storage/nvme-ssd/990-pro-2tb-nvme-pcie-gen-4-mz-v9p2t0bwRead 14 October 2026Maximum power consumption (burst mode) 8.5 W for the 2TB. The page also lists average power at system level of 5.5 W, which is not stored. KitGuru quotes the same figures5Maker product pagesamsung.com/uk/memory-storage/nvme-ssd/990-pro-1tb-nvme-pcie-gen-4-mz-v9p1t0bwRead 14 October 20261TB, maximum power (burst mode) 7.8 W. Average at system level 5.4 W is not stored6Maker product pagesamsung.com/uk/memory-storage/nvme-ssd/990-pro-4tb-nvme-pcie-gen-4-mz-v9p4t0bwRead 14 October 20264TB, maximum power (burst mode) 8.6 W. Average at system level 6.5 W is not stored7Maker product pagesamsung.com/sg/memory-storage/nvme-ssd/nvme-pcie-gen-4-2tb-mz-v9p2t0cwRead 14 October 20262TB with heatsink, maximum power (burst mode) 8.5 W8Maker product pagesamsung.com/sg/memory-storage/nvme-ssd/nvme-pcie-gen-4-1tb-mz-v9p1t0cwRead 14 October 20261TB with heatsink, maximum power (burst mode) 7.8 W9Maker product pagesamsung.com/sg/memory-storage/nvme-ssd/nvme-pcie-gen-4-4tb-mz-v9p4t0cwRead 14 October 20264TB with heatsink, maximum power (burst mode) 8.6 W

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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.

Not available

Not available

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.

55mW1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026Idle with APST on: 50 mW (1TB), 55 mW (2TB), 55 mW (4TB)

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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.

5mW1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026L1.2 mode: 5 mW (1TB and 2TB), 5.8 mW (4TB)

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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.

7,477MB/s18Reviewkitguru.net/components/ssd-drives/simon-crisp/samsung-990-pro-2tb-review/4Read 14 October 20262TB, bare, CrystalDiskMark 8.0.4 default profile, 5 runs of 1 GiB, drive empty and wiped with HDDerase v4, SEQ1M Q8T1 read 7,477.27 MB/s, rounded to 7477. Test bench AMD Ryzen 5 3600X, 16GB DDR4-2400, MSI MPG X570 Gaming Edge WiFi, PCIe 4.0 x4

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

6,885MB/s18Reviewkitguru.net/components/ssd-drives/simon-crisp/samsung-990-pro-2tb-review/4Read 14 October 2026SEQ1M Q8T1 write 6,885.12 MB/s, rounded to 6885, same run

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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.

81.28MB/s18Reviewkitguru.net/components/ssd-drives/simon-crisp/samsung-990-pro-2tb-review/4Read 14 October 2026RND4K Q1T1 read 81.28 MB/s from the default profile screenshot, same value as the 4K QD1 Threads 1 chart

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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.

229.19MB/s18Reviewkitguru.net/components/ssd-drives/simon-crisp/samsung-990-pro-2tb-review/4Read 14 October 2026RND4K Q1T1 write 229.19 MB/s, same run

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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.

240GB14Reviewtomshardware.com/reviews/samsung-990-pro-ssd-review/2Read 14 October 20262TB, bare. Iometer sustained sequential write for 15 minutes: up to 6.2 GB/s for 39 seconds, which the review reads as a pSLC cache of about 240 GB. Samsung rates the 2TB at 226 GB, 10 GB static and 216 GB dynamic

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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.

1,400MB/s14Reviewtomshardware.com/reviews/samsung-990-pro-ssd-review/2Read 14 October 20262TB. After the cache the drive holds around 1.4 GB/s in a direct-to-TLC mode, stored as 140016Reviewtomshardware.com/reviews/samsung-990-pro-4tb-ssd-review/2Read 14 October 20264TB, bare, read from chart. Review text: the drive did not fall to a folding state and held steady in TLC mode above 1.6 GB/s after about 75 seconds in pSLC mode. The steady state average after 15 minutes is 1,632 MB/s

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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.

72°C14Reviewtomshardware.com/reviews/samsung-990-pro-ssd-review/2Read 14 October 20262TB, no heatsink. Over 1.6 TB of writes the drive reached around 72 C. The review names the S.M.A.R.T. sensor and an IR gun for the idle readings and does not say which one gave the 72 C. Intel Core i9-12900K on Asus ROG Maximus Z790 Hero, drive prefilled to 50 percent and tested as a secondary device

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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".

839mW14Reviewtomshardware.com/reviews/samsung-990-pro-ssd-review/2Read 14 October 20262TB, read from chart. Quarch PPM idle power with ASPM and LPM disabled: 839 mW. In Full Power Mode the same drive reads 1,252 mW16Reviewtomshardware.com/reviews/samsung-990-pro-4tb-ssd-review/2Read 14 October 20264TB, read from chart. Quarch PPM idle power with ASPM and LPM disabled: 1,266 mW

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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.

Without heatsink, With heatsink2Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_with_heatsink_datasheet_rev.3.0.pdfRead 14 October 2026Bare drives are in the main data sheet. Heatsink versions are in this data sheet, Revision 3.0 (2023, 4TB capacity added, power values revised)

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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.

Yes2Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_with_heatsink_datasheet_rev.3.0.pdfRead 14 October 2026Footnote 8 says the LED display colour may look different from the colour setting. Samsung's press releases say the heatsink version has RGB lights controlled in Magician10Press releasenews.samsung.com/global/samsung-electronics-unveils-high-performance-990-pro-ssd-optimized-for-gaming-and-creative-applicationsRead 14 October 2026The 990 PRO with Heatsink version has RGB lights. A 4TB capacity was announced for 2023. The press release names MSRPs of $179 for the 1TB and $309 for the 2TB, which differ from the US launch prices reported by Tom's Hardware and stored here11Press releasenews.samsung.com/global/samsung-electronics-4tb-ssd-990-pro-series-brings-ultimate-performance-and-capacity-for-gamers-and-creatorsRead 14 October 2026Magician software supports RGB functionality for the 990 PRO with Heatsink, with colour and LED effect settings13Reviewtomshardware.com/reviews/samsung-990-pro-ssd-reviewRead 14 October 2026Review says the heatsink version has RGB, controlled in Magician 7.2

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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_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026Data Security row reads AES 256-bit Full Disk Encryption, TCG/Opal V2.0, Encrypted Drive (IEEE1667)

Not available

Software

Samsung Magician4Maker product pagesamsung.com/uk/memory-storage/nvme-ssd/990-pro-2tb-nvme-pcie-gen-4-mz-v9p2t0bwRead 14 October 2026Software row, Magician software for SSD management

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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), PS51Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026Usage Application reads Client PCs, PlayStation 5, and this is the bare drive. Client PCs is stored as PC. A PS5 needs a heatsink for an internal drive, so the maker's PS5 line for the bare drive is kept as published

Xbox Series X|S1Maker product pageseagate.com/products/gaming-drives/xbox-gaming/storage-expansion-for-xbox-series-xRead 15 October 2026Page names Xbox Series X|S. Games of the original Xbox, Xbox 360 and Xbox One are stored on it, but they run on the Series console

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.

Length80Width22Height2.3mm(3.1 × 0.9 × 0.1 in)1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026Bare drive, Max 80.0 x Max 22 x Max 2.3 mm on all capacities2Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_with_heatsink_datasheet_rev.3.0.pdfRead 14 October 2026Heatsink models, Max 80.15 x Max 25 x Max 8.88 mm on all capacities. Rev 1.0 listed 80.0 x 24.3 x 8.2 mm, revised in Rev 2.0 (June 2023). Samsung regional pages still show the older size

Length52.95Width31.6Height8.8mm(2.1 × 1.2 × 0.3 in)2Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 2026Product Dimensions rows are labelled Length 8.8 mm, Width 31.6 mm and Height 52.95 mm. The height row is the long side, so it is stored as length, and the thickness 8.8 mm as height. The 4TB column reads Height 59.3 mm instead of 52.95 mm, which is stored for the 4TB row3Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-2-2412US-en_US.pdfRead 15 October 2026This older sheet gives a thickness of 7.8 mm and a long side of 52.95 mm for all three capacities. The newer sheets give 8.8 mm for 1TB and 2TB, so 7.8 mm is stored only for the 512GB row, which the newer sheets do not cover4Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-4-2504US-en_US.pdfRead 15 October 2026Same 8.8 x 31.6 x 52.95 mm as the 2501 sheet

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.

9g(0.3 oz)4Maker product pagesamsung.com/uk/memory-storage/nvme-ssd/990-pro-2tb-nvme-pcie-gen-4-mz-v9p2t0bwRead 14 October 2026Specifications tab, 2TB, Max 9.0 g, published as a maximum5Maker product pagesamsung.com/uk/memory-storage/nvme-ssd/990-pro-1tb-nvme-pcie-gen-4-mz-v9p1t0bwRead 14 October 20261TB, Max 9.0 g6Maker product pagesamsung.com/uk/memory-storage/nvme-ssd/990-pro-4tb-nvme-pcie-gen-4-mz-v9p4t0bwRead 14 October 20264TB, max 9.0 g7Maker product pagesamsung.com/sg/memory-storage/nvme-ssd/nvme-pcie-gen-4-2tb-mz-v9p2t0cwRead 14 October 2026990 PRO with Heatsink 2TB, Max 28.0 g. The Singapore page still lists the older 80 x 24.3 x 8.2 mm size, which the data sheet replaced8Maker product pagesamsung.com/sg/memory-storage/nvme-ssd/nvme-pcie-gen-4-1tb-mz-v9p1t0cwRead 14 October 2026990 PRO with Heatsink 1TB, Max 28.0 g9Maker product pagesamsung.com/sg/memory-storage/nvme-ssd/nvme-pcie-gen-4-4tb-mz-v9p4t0cwRead 14 October 2026990 PRO with Heatsink 4TB, Max 28.0 g

26g(0.9 oz)2Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 2026Weight row reads 0.026 kg for 1TB and 2TB and 0.027 kg for 4TB3Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-2-2412US-en_US.pdfRead 15 October 20260.03 kg for 512GB, 1TB and 2TB. The newer sheets give 0.026 kg for 1TB and 2TB. 30 g is stored only for the 512GB row4Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-4-2504US-en_US.pdfRead 15 October 20260.026 kg for 1TB and 2TB

In the box

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In the box

Samsung SSD 990 PRO 1TB, Samsung SSD 990 PRO 2TB, Samsung SSD 990 PRO 4TB, Samsung SSD 990 PRO with Heatsink 1TB, Samsung SSD 990 PRO with Heatsink 2TB, Samsung SSD 990 PRO with Heatsink 4TB, Warranty Statement1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026Product lineup table, box contents are the drive and a warranty statement2Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_with_heatsink_datasheet_rev.3.0.pdfRead 14 October 2026Product lineup table, box contents are the drive with heatsink and a warranty statement

Seagate Storage Expansion Card for Xbox Series X|S, Protective Cover, Quick Start Guide2Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 2026What's Included lists the card, Protective Cover and Quick Start Guide4Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-4-2504US-en_US.pdfRead 15 October 2026Same What's Included list

Cables includediCables supplied with an external drive.

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Links

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Product page

www.samsung.com/us/memory-storage/nvme-ssd/990-pro-pcie-4-0-nvme-ssd-1tb-sku-mz-v9p2t0b-am3Maker product pagesamsung.com/us/memory-storage/nvme-ssd/990-pro-pcie-4-0-nvme-ssd-1tb-sku-mz-v9p2t0b-amRead 14 October 2026

www.seagate.com/products/gaming-drives/xbox-gaming/storage-expansion-for-xbox-series-x1Maker product pageseagate.com/products/gaming-drives/xbox-gaming/storage-expansion-for-xbox-series-xRead 15 October 2026Seagate US product page. It shows no stock on 2026-10-15 and lists no specifications table, capacities, speeds or prices

Spec sheet

download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdf1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026Samsung V-NAND SSD 990 PRO Data Sheet, Revision 2.0 (2023), covers 1TB, 2TB and 4TB. Rev 1.0 (October 2022) covered 1TB and 2TB only, with older power values

www.seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdf2Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 2026Seagate data sheet DS2081.3-2501US covering 1TB, 2TB and 4TB. The newest sheet found for the 4TB card

Manual

Not available

www.seagate.com/ca/en/manuals/xbox-expansion5Owner's manualseagate.com/ca/en/manuals/xbox-expansionRead 15 October 2026Seagate's online user manual for the Storage Expansion Card for Xbox Series X/S (installation, serial number and regulatory sections, copyright 2021)

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

1 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.

5years1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 20265 years limited, or the TBW, whichever comes first

3years2Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 2026Warranty, Limited (years) row reads 3 for all three capacities. The sheet is worldwide (Region WW) and names no market3Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-2-2412US-en_US.pdfRead 15 October 20263 years, the same as the newer sheets

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