SSDs / Compare

Lexar NM990 vs Sandisk Optimus 5100

A

Product A: Lexar

NM990

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B

Product B: Sandisk

Optimus 5100

46 of 63 known

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Every value links to where we found it.

Only differences

ALexar NM990

BSandisk Optimus 5100

General

4 of 9 differ

Series

NM9901Maker product pagelexar.com/global/products/Lexar-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026Maker line name is NM990

Optimus2Maker product pagesandisk.com/products/ssd/internal-ssd/sandisk-optimus-5100-internal-nvme-ssdRead 14 October 2026Maker line name is SANDISK Optimus, model 5100

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

LNM990X001T-RNNNG, LNM990X001T-RNNNU, LNM990X002T-RNNNG, LNM990X002T-RNNNU, LNM990X004T-RNNNG, LNM990X004T-RNNNU1Maker product pagelexar.com/global/products/Lexar-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026Part number table, region Global: LNM990X001T-RNNNG, LNM990X002T-RNNNG and LNM990X004T-RNNNG. The 2TB number is on this page, not on the retailer listings. The RNNNU North America codes are in the setup sheet2Maker spec sheet (PDF)resources.lexar.com/download/2254/document/14461/setupsheet-nm990-pcie-5-0-ssd.pdfRead 14 October 2026Ordering information: Global LNM990X001T-RNNNG, LNM990X002T-RNNNG, LNM990X004T-RNNNG and North America LNM990X001T-RNNNU, LNM990X002T-RNNNU, LNM990X004T-RNNNU

SDSP51500GAN, SDSP51500GAN-000E0, WDS500G5B0E-00CPE0, SDSP51100TAN, SDSP51100TAN-000E0, WDS100T5B0E-00CPE0, SDSP51200TAN, SDSP51200TAN-000E0, WDS200T5B0E-00CPE0, SDSP51400TAN, SDSP51400TAN-000E0, WDS400T5B0E-00CPE01Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026Product specifications table: SDSP51500GAN, SDSP51100TAN, SDSP51200TAN and SDSP51400TAN for 500GB, 1TB, 2TB and 4TB. The -000E0 suffix is on the product page2Maker product pagesandisk.com/products/ssd/internal-ssd/sandisk-optimus-5100-internal-nvme-ssdRead 14 October 2026Specifications tables list SDSP51500GAN-000E0, SDSP51100TAN-000E0, SDSP51200TAN-000E0 and SDSP51400TAN-000E0. The WDS legacy codes come from Tom's Hardware3Press articletomshardware.com/pc-components/ssds/sandisk-launches-wd-blue-sn5100-ssd-touting-30-percent-higher-performance-than-predecessor-pcie-4-0-dram-less-drives-start-at-usd54Read 14 October 2026The WD Blue SN5100 part numbers are in Tom's Hardware's review table4Reviewtomshardware.com/pc-components/ssds/sandisk-wd-blue-sn5100-2tb-ssd-reviewRead 14 October 2026Part numbers WDS500G5B0E-00CPE0, WDS100T5B0E-00CPE0, WDS200T5B0E-00CPE0 and WDS400T5B0E-00CPE0

GTIN / EAN

843367136841, 843367136872, 843367136858, 843367136889, 843367136865, 8433671368962Maker spec sheet (PDF)resources.lexar.com/download/2254/document/14461/setupsheet-nm990-pcie-5-0-ssd.pdfRead 14 October 2026Single UPC column. Global: 843367136841 (1TB), 843367136858 (2TB), 843367136865 (4TB). North America: 843367136872, 843367136889, 843367136896. The 10-pack UPCs are not stored

619659232306, 619659232290, 619659232283, 6196592322762Maker product pagesandisk.com/products/ssd/internal-ssd/sandisk-optimus-5100-internal-nvme-ssdRead 14 October 2026UPCs in the product page data: 619659232306 (500GB), 619659232290 (1TB), 619659232283 (2TB) and 619659232276 (4TB)

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

Not available

27 August 20253Press articletomshardware.com/pc-components/ssds/sandisk-launches-wd-blue-sn5100-ssd-touting-30-percent-higher-performance-than-predecessor-pcie-4-0-dram-less-drives-start-at-usd54Read 14 October 2026Launch article published 27 August 2025: Sandisk announced the WD Blue SN5100, successor to the SN5000

Status

Available1Maker product pagelexar.com/global/products/Lexar-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026Listed on the Lexar page and on retailers

Available2Maker product pagesandisk.com/products/ssd/internal-ssd/sandisk-optimus-5100-internal-nvme-ssdRead 14 October 2026Product page lists the four capacities. The store shows a back-in-stock notification for each capacity, so the maker store is out of stock. Retailers list the drive

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

Not available

Not available

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

Not available

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

Not available

$149.993Press articletomshardware.com/pc-components/ssds/sandisk-launches-wd-blue-sn5100-ssd-touting-30-percent-higher-performance-than-predecessor-pcie-4-0-dram-less-drives-start-at-usd54Read 14 October 2026MSRP table in the launch article: 500GB $54.99, 1TB $79.99, 2TB $149.99 and 4TB $299.99. US prices before tax, stated as WD Blue SN5100 pricing8Reviewservethehome.com/sandisk-wd-blue-sn5100-2tb-pcie-gen4-nvme-ssd-review/3Read 14 October 2026Launching on 27 August 2025 at an MSRP of $150 for the 2TB, which matches the $149.99 in the launch article

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

Not available

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

Not available

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-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026Form factor row reads M.2 22802Maker spec sheet (PDF)resources.lexar.com/download/2254/document/14461/setupsheet-nm990-pcie-5-0-ssd.pdfRead 14 October 2026

M.2 22801Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026Form factor row reads M.2 2280

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 product pagelexar.com/global/products/Lexar-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026Capacity row reads 1TB, 2TB, 4TB. Footnote: 1GB equals 1 billion bytes. ComputerBase lists 1,024, 2,048 and 4,096 GB, which Lexar does not publish, so decimal values are stored2Maker spec sheet (PDF)resources.lexar.com/download/2254/document/14461/setupsheet-nm990-pcie-5-0-ssd.pdfRead 14 October 2026

500 GB, 1 TB, 2 TB, 4 TB1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026500GB, 1TB, 2TB and 4TB. 1TB is 1 trillion bytes

Interface

2 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-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026Interface row reads PCIe Gen5x4. The page gives no NVMe version2Maker spec sheet (PDF)resources.lexar.com/download/2254/document/14461/setupsheet-nm990-pcie-5-0-ssd.pdfRead 14 October 2026

PCIe NVMe1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026PCIe 4.0 x4, NVMe. Footnote 10 says it is backwards compatible with PCIe 3.0 x4, 3.0 x2, 3.0 x1, 2.0 x4, 2.0 x2 and 2.0 x1. The datasheet gives no NVMe version

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.

51Maker product pagelexar.com/global/products/Lexar-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026

41Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.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-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026

41Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.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

2.04Reviewtomshardware.com/pc-components/ssds/sandisk-wd-blue-sn5100-2tb-ssd-reviewRead 14 October 2026Spec table reads PCIe 4.0 x4 NVMe 2.0 on all capacities7Reviewservethehome.com/sandisk-wd-blue-sn5100-2tb-pcie-gen4-nvme-ssd-reviewRead 14 October 2026CrystalDiskInfo confirms PCIe 4.0 x4 speeds using NVMe 2.09Reviewstoragereview.comRead 14 October 2026Specification table reads NVMe 2.0d. Tom's Hardware and ServeTheHome read NVMe 2.0, which is stored

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 MAP1806A4Press articlecomputerbase.de/news/storage/lexar-nm990-diesen-controller-nutzt-die-neue-pcie-5-0-ssd.93511Read 14 October 2026ComputerBase reads the NM990 uses the Maxio MAP1806A 8-channel controller with Micron TLC NAND. The maker does not name the controller5Press articlebenchmark.pl/aktualnosci/lexar-nm990-tanie-dyski-ssd-pcie-5.htmlRead 14 October 2026Reads an 8-channel Maxiotek MAP1806A controller, with a photo credited to Tweakers6Reviewallround-pc.com/artikel/lexar-nm990-ssd-test-pcie-5-fuer-wenig-geldRead 14 October 20262TB review names the Maxiotek MAP1806A, 8 NAND channels, hidden under the sticker

Sandisk Polaris 34Reviewtomshardware.com/pc-components/ssds/sandisk-wd-blue-sn5100-2tb-ssd-reviewRead 14 October 2026Spec table reads Sandisk Proprietary and does not name the model. PCGH names it Polaris 3, which is stored10Press articlepcgameshardware.de/SSD-Hardware-255552/News/Sandisk-SN5100-PCIe-4-NVMe-1480772Read 14 October 2026PCGH reads that the drive combines BiCS8 QLC NAND with the Sandisk Polaris 3 controller. The maker does not name the controller. Tom's Hardware reads Sandisk proprietary, so no source contradicts it

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.

TLC4Press articlecomputerbase.de/news/storage/lexar-nm990-diesen-controller-nutzt-die-neue-pcie-5-0-ssd.93511Read 14 October 2026Table reads TLC (3D) NAND. The flash maker is read as Micron by ComputerBase and as Longsys by allround-pc, so the flash row is not stored6Reviewallround-pc.com/artikel/lexar-nm990-ssd-test-pcie-5-fuer-wenig-geldRead 14 October 2026Review says the flash runs in TLC mode with an SLC write cache. It says the flash comes from Longsys and Lexar does not name the generation

QLC1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026NAND row reads SANDISK QLC 3D CBA NAND and the text says 8th generation SANDISK BiCS QLC 3D CBA NAND7Reviewservethehome.com/sandisk-wd-blue-sn5100-2tb-pcie-gen4-nvme-ssd-reviewRead 14 October 2026Sandisk QLC NAND, the first Blue drive with QLC at every capacity

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

Not available

Sandisk BiCS8 QLC1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 20268th generation SANDISK BiCS QLC 3D CBA NAND. The datasheet gives no layer count4Reviewtomshardware.com/pc-components/ssds/sandisk-wd-blue-sn5100-2tb-ssd-reviewRead 14 October 2026Same spec table row

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

Not available

2184Reviewtomshardware.com/pc-components/ssds/sandisk-wd-blue-sn5100-2tb-ssd-reviewRead 14 October 2026Spec table reads Sandisk 218-Layer BiCS8 QLC

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-Launches-the-NM990-PCIe-5-0-SSDRead 14 October 2026Key features read HMB and SLC Dynamic Cache. The release gives no DRAM chip4Press articlecomputerbase.de/news/storage/lexar-nm990-diesen-controller-nutzt-die-neue-pcie-5-0-ssd.93511Read 14 October 2026Table reads no DRAM cache5Press articlebenchmark.pl/aktualnosci/lexar-nm990-tanie-dyski-ssd-pcie-5.htmlRead 14 October 2026Reads the design has no DRAM cache, unlike the NM1090 models6Reviewallround-pc.com/artikel/lexar-nm990-ssd-test-pcie-5-fuer-wenig-geldRead 14 October 2026Review text says DRAM-less with Host Memory Buffer. Its spec box lists 4GB LPDDR4, which disagrees with its own text, ComputerBase, Benchmark.pl and Lexar, and is not used

None, uses host memory (HMB)1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026DRAM cache row reads Host Memory Buffer. SLC cache row reads SANDISK nCache 4.04Reviewtomshardware.com/pc-components/ssds/sandisk-wd-blue-sn5100-2tb-ssd-reviewRead 14 October 2026Spec table lists N/A (HMB) on all capacities7Reviewservethehome.com/sandisk-wd-blue-sn5100-2tb-pcie-gen4-nvme-ssd-reviewRead 14 October 2026No DRAM cache9Reviewstoragereview.comRead 14 October 2026DRAM-less, Host Memory Buffer

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

Not available

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.

Not available

Single-sided4Reviewtomshardware.com/pc-components/ssds/sandisk-wd-blue-sn5100-2tb-ssd-reviewRead 14 October 2026Spec table lists M.2 2280 (Single-sided) for every capacity. The review says the drive has a single NAND flash chip7Reviewservethehome.com/sandisk-wd-blue-sn5100-2tb-pcie-gen4-nvme-ssd-reviewRead 14 October 2026The 2TB comes in a single-sided M.2 2280 form factor with one NAND package9Reviewstoragereview.comRead 14 October 2026Specification table reads form factor M.2 2280-S3-M, where S is single-sided

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.

14,000MB/s1Maker product pagelexar.com/global/products/Lexar-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026Speed row, up to 14,000 MB/s read at 1TB, 2TB and 4TB. Based on internal testing, host not named2Maker spec sheet (PDF)resources.lexar.com/download/2254/document/14461/setupsheet-nm990-pcie-5-0-ssd.pdfRead 14 October 2026Same speed table as the product page. Setup sheet availability date is June 2025

7,100MB/s1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026Sequential read 1MB at queue depth 8, 1 thread, up to. 6,600, 7,100, 7,100 and 6,900 MB/s for 500GB, 1TB, 2TB and 4TB. Based on internal testing, host not named

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

10,000MB/s1Maker product pagelexar.com/global/products/Lexar-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026Up to 7,500 MB/s (1TB), 10,000 MB/s (2TB) and 11,000 MB/s (4TB)2Maker spec sheet (PDF)resources.lexar.com/download/2254/document/14461/setupsheet-nm990-pcie-5-0-ssd.pdfRead 14 October 2026

6,700MB/s1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026Sequential write 1MB, same settings. 5,600, 6,700, 6,700 and 6,700 MB/s

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.

2,000,000IOPS1Maker product pagelexar.com/global/products/Lexar-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026Up to 1600K (1TB), 2000K (2TB) and 2000K (4TB) IOPS. Queue depth is not stated2Maker spec sheet (PDF)resources.lexar.com/download/2254/document/14461/setupsheet-nm990-pcie-5-0-ssd.pdfRead 14 October 2026

1,000,000IOPS1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026Random 4KB at queue depth 32, 16 threads, up to. 660K, 1M, 1M and 900K IOPS

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.

1,400,000IOPS1Maker product pagelexar.com/global/products/Lexar-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026Up to 1000K (1TB), 1400K (2TB) and 1500K (4TB) IOPS2Maker spec sheet (PDF)resources.lexar.com/download/2254/document/14461/setupsheet-nm990-pcie-5-0-ssd.pdfRead 14 October 2026

1,300,000IOPS1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 20261.1M, 1.3M, 1.3M and 1.1M IOPS, same test settings

Endurance and reliability

3 of 3 differ

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

1,500TB1Maker product pagelexar.com/global/products/Lexar-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026TBW row: 1TB 750TBW, 2TB 1500TBW, 4TB 3000TBW2Maker spec sheet (PDF)resources.lexar.com/download/2254/document/14461/setupsheet-nm990-pcie-5-0-ssd.pdfRead 14 October 20263Press releaselexar.com/global/news/Lexar-Launches-the-NM990-PCIe-5-0-SSDRead 14 October 2026Rated capacity of up to 3000 TBW (4TB)

900TB1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026300, 600, 900 and 1,200 TBW, JEDEC client workload JESD219. Warranty is 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-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026MTBF row reads 1,500,000 hours. Published as MTBF2Maker spec sheet (PDF)resources.lexar.com/download/2254/document/14461/setupsheet-nm990-pcie-5-0-ssd.pdfRead 14 October 2026

1,750,000h1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026Published as MTTF up to 1.75M hours from Telcordia SR-332 testing at 25 C. It is not an MTBF

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

Min0Max70°C1Maker product pagelexar.com/global/products/Lexar-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 20260 to 70 C. The storage range of -40 to 85 C is not stored2Maker spec sheet (PDF)resources.lexar.com/download/2254/document/14461/setupsheet-nm990-pcie-5-0-ssd.pdfRead 14 October 2026

Min0Max85°C1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 20260 to 85 C as reported by the drive. The non-operating range is not stored

Power

3 of 6 differ

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

4.1W1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026Average power read, IOMeter 1.1.0 burst sequential read, 10 second moving average. 3.8, 3.9, 4.1 and 4.3 W by capacity

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

4.1W1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026Average power write, same method. 3.8, 3.9, 4.1 and 4.3 W by capacity

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

Not available

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

Not available

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

Not available

4mW1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026Row reads Idle (Sleep): 4 mW for 500GB to 2TB and 4.5 mW for 4TB. At 4 mW the value is a deep sleep state, so it is stored as sleep power. The datasheet gives no active idle figure

Measured

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

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6,999MB/s6Reviewservethehome.com/sandisk-wd-blue-sn5100-2tb-pcie-gen4-nvme-ssd-review/2Read 14 October 20262TB, CrystalDiskMark 8.0.4 x64, 1GiB test size, five runs, SEQ1M Q8T1 read 6,998.65 MB/s. The screenshot shows the drive as C: with 64% used (1193 of 1863 GiB). Read from the CrystalDiskMark screenshot. AMD Ryzen 9 7900X on MSI MAG X670E Tomahawk, M.2_1 slot with PCIe 5.0 x4

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

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6,589MB/s6Reviewservethehome.com/sandisk-wd-blue-sn5100-2tb-pcie-gen4-nvme-ssd-review/2Read 14 October 2026SEQ1M Q8T1 write 6,589.47 MB/s, 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.

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73.69MB/s6Reviewservethehome.com/sandisk-wd-blue-sn5100-2tb-pcie-gen4-nvme-ssd-review/2Read 14 October 2026RND4K Q1T1 read 73.69 MB/s, same screenshot

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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304.4MB/s6Reviewservethehome.com/sandisk-wd-blue-sn5100-2tb-pcie-gen4-nvme-ssd-review/2Read 14 October 2026RND4K Q1T1 write 304.40 MB/s, same screenshot

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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500GB5Reviewtomshardware.com/pc-components/ssds/sandisk-wd-blue-sn5100-2tb-ssd-review/2Read 14 October 20262TB, 15-minute Iometer sequential write, 1MiB blocks, queue depth 32. The drive wrote at 6.45 GB/s for over 78 seconds and the review says the cache is over 500GB. Stored as 500, since the review gives no exact size. Intel Core i9-12900K on Asus ROG Maximus Z790 Hero, drive prefilled to 50% and tested as a secondary device

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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4,192points9Reviewstoragereview.comRead 14 October 20262TB overall score 4,192 in the 3DMark Storage Benchmark. StorageReview Gen5 test bench, 2TB drive. Drive fill and test size are not stated

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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53°C5Reviewtomshardware.com/pc-components/ssds/sandisk-wd-blue-sn5100-2tb-ssd-review/2Read 14 October 20262TB. Maximum 53 C during the write test, primary composite sensor, about 22 C ambient. The review uses active cooling for all SSDs unless noted and does not say a heatsink was fitted. ServeTheHome logged a 67 C peak with no heatsink or active cooling

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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1,118mW5Reviewtomshardware.com/pc-components/ssds/sandisk-wd-blue-sn5100-2tb-ssd-review/2Read 14 October 20262TB, Quarch PPM idle power with ASPM/LPM disabled, 1,118 mW. Read from chart. The chart is the worst case on a desktop board

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 heatsink1Maker product pagelexar.com/global/products/Lexar-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026The page lists no heatsink version6Reviewallround-pc.com/artikel/lexar-nm990-ssd-test-pcie-5-fuer-wenig-geldRead 14 October 2026All models ship without a heatsink. The review's spec box lists 3.6 mm thickness, which disagrees with Lexar's 2.45 mm, and is not used

Without heatsink1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026Bare M.2 2280 module. The datasheet and product page list no heatsink version2Maker product pagesandisk.com/products/ssd/internal-ssd/sandisk-optimus-5100-internal-nvme-ssdRead 14 October 2026No heatsink version listed

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

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Dust and water ratingiPublished IP rating of an external drive.

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

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Security and software

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

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TCG Pyrite (no encryption), Password protection1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026Security row reads TCG Pyrite 2.01 and ATA Security passthrough over NVMe. Pyrite has no encryption. ATA Security is the drive password feature, stored as password protection

Software

Lexar DiskMaster2Maker spec sheet (PDF)resources.lexar.com/download/2254/document/14461/setupsheet-nm990-pcie-5-0-ssd.pdfRead 14 October 2026Lexar DiskMaster SSD Management tool for firmware updates, drive management and health monitoring3Press releaselexar.com/global/news/Lexar-Launches-the-NM990-PCIe-5-0-SSDRead 14 October 2026Lexar DiskMaster SSD Management tool

SanDisk Dashboard1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026Featured software: SANDISK Dashboard (Windows only) and Acronis True Image for SANDISK

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.

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Windows2Maker product pagesandisk.com/products/ssd/internal-ssd/sandisk-optimus-5100-internal-nvme-ssdRead 14 October 2026Compatibility reads Windows 10+, PCIe 4.0 x4 interface and M.2 2280 port. No PS5 or handheld claim on the page

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-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026Dimension row reads 80 x 22 x 2.45 mm (3.15 x 0.87 x 0.10 in). The row label says W x L x H, the values are length 80 and width 222Maker spec sheet (PDF)resources.lexar.com/download/2254/document/14461/setupsheet-nm990-pcie-5-0-ssd.pdfRead 14 October 202680 x 22 x 2.45 mm (L x W x H)

Length80Width22Height2.38mm(3.1 × 0.9 × 0.1 in)1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 202680 x 22 x 2.38 mm for 500GB to 4TB. Length and width vary by 0.15 mm2Maker product pagesandisk.com/products/ssd/internal-ssd/sandisk-optimus-5100-internal-nvme-ssdRead 14 October 20263.15 x 0.87 x 0.09 in on the page, the datasheet has the metric values

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-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 20266 g / 0.013 lbs2Maker spec sheet (PDF)resources.lexar.com/download/2254/document/14461/setupsheet-nm990-pcie-5-0-ssd.pdfRead 14 October 2026Unit weight 6 g

5.7g(0.2 oz)1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 20265.7 g for 500GB to 4TB, plus or minus 1 g2Maker product pagesandisk.com/products/ssd/internal-ssd/sandisk-optimus-5100-internal-nvme-ssdRead 14 October 20265.7 g

In the box

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In the box

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SANDISK Optimus 5100 NVMe SSD2Maker product pagesandisk.com/products/ssd/internal-ssd/sandisk-optimus-5100-internal-nvme-ssdRead 14 October 2026In The Box reads SANDISK Optimus 5100 NVMe SSD

Cables includediCables supplied with an external drive.

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Links

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Product page

www.lexar.com/global/products/Lexar-NM990-M-2-2280-PCIe-5-0-NVMe-SSD1Maker product pagelexar.com/global/products/Lexar-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026Lexar Global product page

www.sandisk.com/products/ssd/internal-ssd/sandisk-optimus-5100-internal-nvme-ssd2Maker product pagesandisk.com/products/ssd/internal-ssd/sandisk-optimus-5100-internal-nvme-ssdRead 14 October 2026

Spec sheet

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documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdf1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 2026

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 product pagelexar.com/global/products/Lexar-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 14 October 2026Five-year limited warranty2Maker spec sheet (PDF)resources.lexar.com/download/2254/document/14461/setupsheet-nm990-pcie-5-0-ssd.pdfRead 14 October 2026Five-year limited warranty

5years1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus/data-sheet-sandisk-optimus-5100-internal-ssd.pdfRead 14 October 20265 years or the TBW limit, whichever comes first

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