SSDs / Compare

Lexar NM790 vs Samsung 990 PRO

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Product A: Lexar

NM790

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B

Product B: Samsung

990 PRO

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Only differences

ALexar NM790

BSamsung 990 PRO

General

6 of 9 differ

Series

NM7901Maker product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026Maker line name is NM790

Not available

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

LNM790X512G-RNNNG, LNM790X512G-RNNNU, LNM790X001T-RNNNG, LNM790X001T-RNNNU, LNM790X002T-RNNNG, LNM790X002T-RNNNU, LNM790X004T-RNNNG, LNM790X004T-RNNNU, LNM790X008T-RNNNG, LNM790X001T-RN9NG, LNM790X001T-RN9NU, LNM790X002T-RN9NG, LNM790X002T-RN9NU, LNM790X004T-RN9NG, LNM790X004T-RN9NU1Maker product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026Part number table, North America: LNM790X512G-RNNNU, LNM790X001T-RNNNU, LNM790X002T-RNNNU and LNM790X004T-RNNNU. Global: LNM790X512G-RNNNG, LNM790X001T-RNNNG, LNM790X002T-RNNNG, LNM790X004T-RNNNG and LNM790X008T-RNNNG. The 8TB model is global only2Maker spec sheet (PDF)1fodiscount.com/ressources/site/document/product/presentation-de-la-gamme-pour-lexar-nm790-heatsink-4to_9996.pdfRead 14 October 2026Lexar product sheet for the NM790 with Heatsink, dated 07/2023, mirrored by a French reseller. Retail SKU table: Global LNM790X001T-RN9NG, LNM790X002T-RN9NG, LNM790X004T-RN9NG and North America LNM790X001T-RN9NU, LNM790X002T-RN9NU, LNM790X004T-RN9NU

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

GTIN / EAN

843367130283, 843367130290, 843367131358, 843367131242, 843367131488, 843367131259, 843367131495, 843367131518, 8433671315012Maker spec sheet (PDF)1fodiscount.com/ressources/site/document/product/presentation-de-la-gamme-pour-lexar-nm790-heatsink-4to_9996.pdfRead 14 October 2026Single UPC column. Global RN9NG: 843367131242 (1TB), 843367131259 (2TB), 843367131518 (4TB). North America RN9NU: 843367131488, 843367131495, 843367131501. The inner carton UPCs are not stored11Spec databasebuildcores.com/products/Storage/s5inrtet5/Lexar-NM790-2TB-M.2-2280-SSD-PCIe-4.0-X4-NVMeRead 14 October 20262TB listing: UPC 843367130290 and 843367131358 with part numbers LNM790X002T-RNNNG and LNM790X002T-RNNNU, in that order. The mapping of the second UPC to RNNNU follows the listing order12Retailer pageshop.cisilion.com/lexar-nm790-1-tb-m-2-pci-express-4-0-nvme-slc-lnm790x001t-rnnng.htmlRead 14 October 2026Listing for LNM790X001T-RNNNG shows EAN 0843367130283

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

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

29 May 20233Press releaselexar.com/global/news/Lexar-Announces-Neq-NM790-SSDRead 14 October 2026Lexar news item dated 2023-05-29. The body text says 2022, which is a typo. Back2Gaming carried the release on 26 May 2023

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

Status

Available1Maker product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026Listed on the Lexar Global page with all five capacities3Press releaselexar.com/global/news/Lexar-Announces-Neq-NM790-SSDRead 14 October 2026Available now

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

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

Not available

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.

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.

Not available

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.

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

$124.994Press articlethepcenthusiast.com/lexar-releases-nm790-m-2-gen4-nvme-ssdRead 14 October 2026Reposts Lexar's release of 1 August 2023. The NM790 is available now at MSRPs of $49.99 (512GB), $69.99 (1TB), $124.99 (2TB) and $209.99 (4TB). US, bare drive. The base price is the 2TB model

$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

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.

Not available

€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

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

Not available

Not available

ColoursiThe maker's own colour names

Not available

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

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 product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026Form Factor row reads M.2 2280

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

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.

512 GB, 1 TB, 2 TB, 4 TB, 8 TB1Maker product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026Capacities row reads 512GB/1TB/2TB/4TB/8TB. Lexar's footnote on its product sheet reads 1GB equals 1 billion bytes2Maker spec sheet (PDF)1fodiscount.com/ressources/site/document/product/presentation-de-la-gamme-pour-lexar-nm790-heatsink-4to_9996.pdfRead 14 October 2026Heatsink version in 1TB, 2TB and 4TB. Footnote reads 1GB equals 1 billion bytes

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

Interface

1 of 5 differ

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 product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026Interface row reads PCIe Gen4x4. The page names no NVMe version2Maker spec sheet (PDF)1fodiscount.com/ressources/site/document/product/presentation-de-la-gamme-pour-lexar-nm790-heatsink-4to_9996.pdfRead 14 October 2026Interface row reads PCIe Gen 4x4

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 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 product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026PCIe Gen4x4

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

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

41Maker product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026PCIe Gen4x4

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

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

Not available

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

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

Not available

Not available

Hardware

5 of 7 differ

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.

Maxio MAP1602A6Reviewkitguru.net/components/ssd-drives/simon-crisp/lexar-nm790-4tb-ssd-review/all/1Read 14 October 2026Names a Maxiotech MAP1602A, 4-channel, DRAM-less, built on a 12nm TSMC process. Lexar does not name the controller. Stored as Maxio MAP1602A, as on the NM990 entry7Reviewtomshardware.com/reviews/lexar-nm790-ssd-review/2Read 14 October 2026Names a Maxio MAP1602, DRAM-less. The review says Lexar would not officially confirm the flash, and calls the controller a Maxio MAP1602 seen on other drives. KitGuru names the MAP1602A and LanOC reads MAP1602A-P20 etched on its 2TB sample9Reviewlanoc.org/review/storage/lexar-nm790-2tbRead 14 October 20262TB sample: Maxio MAP1602 with MAP1602A-P20 etched on it

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

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.

TLC6Reviewkitguru.net/components/ssd-drives/simon-crisp/lexar-nm790-4tb-ssd-review/all/1Read 14 October 2026232-Layer 3D TLC NAND, Longsys branded, coded Longsys RY18TAA484210247Reviewtomshardware.com/reviews/lexar-nm790-ssd-review/2Read 14 October 2026Spec table reads 232-Layer YMTC TLC for all four capacities10Reviewthefpsreview.com/2024/04/17/lexar-nm790-with-heatsink-2tb-pcie-gen4-m-2-nvme-ssd-reviewRead 14 October 2026Spec table: Cell Type TLC, 232-Layer NAND, Maxio MAP1602

TLC1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026

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

YMTC 232-layer TLC7Reviewtomshardware.com/reviews/lexar-nm790-ssd-review/2Read 14 October 2026Spec table reads 232-Layer YMTC TLC. The review lists YMTC flash type could vary as a con and says Lexar would not officially confirm the flash8Reviewpcgamer.com/lexar-nm790-4tb-ssd-reviewRead 14 October 2026Review says the NM790 uses 232-layer TLC NAND manufactured by YMTC

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

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

2326Reviewkitguru.net/components/ssd-drives/simon-crisp/lexar-nm790-4tb-ssd-review/all/1Read 14 October 2026232-Layer 3D TLC7Reviewtomshardware.com/reviews/lexar-nm790-ssd-review/2Read 14 October 2026232-Layer YMTC TLC9Reviewlanoc.org/review/storage/lexar-nm790-2tbRead 14 October 20262TB sample uses 232-layer TLC NAND, Longsys branded, two of four NAND pads populated10Reviewthefpsreview.com/2024/04/17/lexar-nm790-with-heatsink-2tb-pcie-gen4-m-2-nvme-ssd-reviewRead 14 October 2026NAND Flash row reads 232-Layer

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

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.

None, uses host memory (HMB)3Press releaselexar.com/global/news/Lexar-Announces-Neq-NM790-SSDRead 14 October 2026Key features read Host Memory Buffer (HMB) 3.06Reviewkitguru.net/components/ssd-drives/simon-crisp/lexar-nm790-4tb-ssd-review/all/1Read 14 October 2026Cache row reads none, Host Memory Buffer (HMB) 3.07Reviewtomshardware.com/reviews/lexar-nm790-ssd-review/2Read 14 October 2026Spec table reads No (HMB)9Reviewlanoc.org/review/storage/lexar-nm790-2tbRead 14 October 2026Review says the NM790 is a DRAM-less design10Reviewthefpsreview.com/2024/04/17/lexar-nm790-with-heatsink-2tb-pcie-gen4-m-2-nvme-ssd-reviewRead 14 October 2026DRAM-less, Host Memory Buffer 3.0, Dynamic SLC caching

DRAM1Maker spec sheet (PDF)download.semiconductor.samsung.com/resources/data-sheet/samsung_nvme_ssd_990_pro_datasheet_rev.2.0.pdfRead 14 October 2026

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.

Not available

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

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-sided6Reviewkitguru.net/components/ssd-drives/simon-crisp/lexar-nm790-4tb-ssd-review/all/1Read 14 October 20264TB sample is built on a single-sided M.2 2280 format with all major components on one side, four NAND packages7Reviewtomshardware.com/reviews/lexar-nm790-ssd-review/2Read 14 October 2026Review says this drive is single-sided, even at 4TB8Reviewpcgamer.com/lexar-nm790-4tb-ssd-reviewRead 14 October 2026Review says the NM790 is single-sided9Reviewlanoc.org/review/storage/lexar-nm790-2tbRead 14 October 2026The 2TB bare sample has four NAND pads and uses two of them. KitGuru, Tom's Hardware and PC Gamer say the 4TB model, which fills the pads, is single-sided. LanOC does not state the board sides, so the 2TB base value rests on those 4TB reviews and on FPS Review for the 2TB with heatsink10Reviewthefpsreview.com/2024/04/17/lexar-nm790-with-heatsink-2tb-pcie-gen4-m-2-nvme-ssd-reviewRead 14 October 2026Review of the 2TB with Heatsink (LNM790X002T-RN9NU): the heatsink covers both sides, but all the silicon is on one side only

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

Performance

4 of 4 differ

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

7,400MB/s1Maker product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026Speed row: up to 7,400 MB/s for 1TB, 2TB and 4TB, 7,200 MB/s for 512GB and 7,000 MB/s for 8TB. Footnote says based on internal testing, host and tool not named. Base is the 2TB model

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

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

6,500MB/s1Maker product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026Up to 6,500 MB/s for 1TB, 2TB and 4TB, 4,400 MB/s for 512GB and 6,200 MB/s for 8TB. Same internal testing

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

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.

1,000,000IOPS1Maker product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026512GB up to 800,000 IOPS. 1TB and 2TB up to 1,000,000. 4TB up to 900,000. 8TB up to 850,000. Queue depth is not stated

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

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.

900,000IOPS1Maker product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026512GB up to 800,000 IOPS. 1TB, 2TB and 4TB up to 900,000. 8TB up to 900,000. Queue depth is not stated

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

Endurance and reliability

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

1,500TB1Maker product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026TBW row: 512GB 500, 1TB 1000, 2TB 1500, 4TB 3000, 8TB 6000

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

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 product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026MTBF row reads 1,500,000 Hours. Published as MTBF2Maker spec sheet (PDF)1fodiscount.com/ressources/site/document/product/presentation-de-la-gamme-pour-lexar-nm790-heatsink-4to_9996.pdfRead 14 October 2026MTBF 1,500,000 hours

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

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

Min0Max70°C1Maker product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 20260 C to 70 C. The storage range of -40 C to 85 C is not stored2Maker spec sheet (PDF)1fodiscount.com/ressources/site/document/product/presentation-de-la-gamme-pour-lexar-nm790-heatsink-4to_9996.pdfRead 14 October 20260 to 70 C

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

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.

Not available

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

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.

Not available

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

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.

Not available

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

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.

Not available

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)

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

Not available

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)

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.

Not available

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

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

Not available

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

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.

Not available

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

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.

Not available

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

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

Not available

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

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.

Not available

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

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.

Not available

Not available

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.

Not available

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

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".

Not available

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

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)1fodiscount.com/ressources/site/document/product/presentation-de-la-gamme-pour-lexar-nm790-heatsink-4to_9996.pdfRead 14 October 2026Second version of the drive with an integrated, pre-installed heatsink. No lighting is mentioned5Press articlefunkykit.com/news/lexar-announces-nm790-m-2-nvme-ssd-with-heatsinkRead 14 October 2026NM790 with Heatsink is a second version of the NM790, designed for PS5 and PC

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)

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.

Not available

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

Dust and water ratingiPublished IP rating of an external drive.

Not available

Not available

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

Not available

Not available

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.

Not available

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)

Software

Not available

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

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), PS53Press releaselexar.com/global/news/Lexar-Announces-Neq-NM790-SSDRead 14 October 2026Compatible with desktop computers, laptops and the PlayStation 5. This item is about the bare drive. A PS5 needs a heatsink, which Sony requires and Lexar sells as the NM790 with Heatsink

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

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.

Length80Width22Height2.45mm(3.1 × 0.9 × 0.1 in)1Maker product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026Dimensions (L x W x H): 512GB-4TB 80 x 22 x 2.45 mm, 8TB 80 x 22 x 3.75 mm. Base is the bare 2TB model

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

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.

6g(0.2 oz)1Maker product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026512GB-4TB 6 g, 8TB 7.6 g

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

In the box

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In the box

Not available

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

Cables includediCables supplied with an external drive.

Not available

Not available

Links

Not compared

Product page

www.lexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSD1Maker product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026

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

Spec sheet

Not available

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

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

Not available

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 product pagelexar.com/global/products/Lexar-NM790-M-2-2280-PCIe-Gen-4x4-NVMe-SSDRead 14 October 2026Five-year limited warranty. The global page names no market2Maker spec sheet (PDF)1fodiscount.com/ressources/site/document/product/presentation-de-la-gamme-pour-lexar-nm790-heatsink-4to_9996.pdfRead 14 October 2026Five-year limited warranty

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

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