SSDs / Compare

KIOXIA EXCERIA PRO G2 vs Lexar NM990

A

Product A: KIOXIA

EXCERIA PRO G2

39 of 63 known

Change KIOXIA EXCERIA PRO G2

Compare the Lexar NM990 with

Search SSDs

B

Product B: Lexar

NM990

25 of 63 known

Change Lexar NM990

Compare the KIOXIA EXCERIA PRO G2 with

Search SSDs

All 63 fields

Every value links to where we found it.

Only differences

AKIOXIA EXCERIA PRO G2

BLexar NM990

General

3 of 9 differ

Series

EXCERIA PRO1Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026The product brief calls the line the EXCERIA PRO G2 SSD Series. The Kioxia site lists EXCERIA PRO and EXCERIA PRO G2 as separate drives, and the line name is EXCERIA PRO

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

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

LVE10Z1T02G8, LVE10Z2T04G8, LVE10Z4T09G81Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026Product Info table: LVE10Z1T02G8 (1,024GB), LVE10Z2T04G8 (2,048GB) and LVE10Z4T09G8 (4,096GB)

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

GTIN / EAN

4582761160286, 4582761160293, 45827611603091Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026EAN per part number in the Product Info table: 4582761160286, 4582761160293 and 4582761160309

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

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

10 December 20254Press releaseeurope.kioxia.com/en-europe/personal/news/2025/20251210-1.htmlRead 15 October 2026Kioxia Europe press release dated 10 December 2025, Duesseldorf

Not available

Status

Available1Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026The page lists the product with a Where to Buy section. Tom's Hardware reviewed it on 2026-09-12 and estimates prices from EU listings6Reviewtomshardware.com/pc-components/ssds/kioxia-exceria-pro-g2-2tb-ssd-reviewRead 15 October 2026Review says Kioxia does not officially distribute the drive at US retail, and Amazon listings may be imports. Prices are estimated from EU listings

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

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

Not available

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 pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026M.2 Type 2280-S3-M for 1,024GB and 2,048GB, 2280-S4-M for 4,096GB. M.2 M key socket2Maker spec sheet (PDF)europe.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/productbrief/KIOXIA_Exceria_Pro_G2_SSD_Product_Brief.pdfRead 15 October 2026

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

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.

1,024, 2,048, 4,096GB1Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026The page publishes 1,024GB, 2,048GB and 4,096GB and defines 1GB as 1,000,000,000 bytes. Stored as published. The 2,048GB model is the base2Maker spec sheet (PDF)europe.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/productbrief/KIOXIA_Exceria_Pro_G2_SSD_Product_Brief.pdfRead 15 October 2026Capacity row 1024GB, 2048GB, 4096GB

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

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 pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026PCI Express Base Specification Revision 5.0, interface maximum speed 128 GT/s (PCIe Gen5 x4)

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 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 pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026PCIe Gen5 x4

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

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

41Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026PCIe Gen5 x4

41Maker product pagelexar.com/global/products/Lexar-NM990-M-2-2280-PCIe-5-0-NVMe-SSDRead 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.

2.01Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026Interface protocol NVM Express Base Specification 2.0d, stored as 2.0 without the revision letter. PCIe Vendor Defined Messages are not supported

Not available

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

Not available

Not available

Hardware

6 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.

Silicon Motion SM25086Reviewtomshardware.com/pc-components/ssds/kioxia-exceria-pro-g2-2tb-ssd-reviewRead 15 October 2026Tom's Hardware, review dated 12 September 2026: the top of the drive shows the Silicon Motion SM2508 controller, one DRAM package and two NAND packages7Reviewclub386.com/kioxia-exceria-pro-g2-reviewRead 15 October 2026Club386, review dated 17 July 2026: spec table lists the Silicon Motion SM25088Reviewkitguru.net/components/ssd-drives/simon-crisp/kioxia-exceria-pro-g2-4tb-pcie-5-0-ssd-review/all/1Read 15 October 2026KitGuru, review dated 1 April 2026: Silicon Motion SM2508 8-channel controller with Kioxia BiCS8 218-layer TLC

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

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 product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026Flash memory type BiCS FLASH TLC

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

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

Kioxia BiCS8 TLC6Reviewtomshardware.com/pc-components/ssds/kioxia-exceria-pro-g2-2tb-ssd-reviewRead 15 October 2026Spec table: Kioxia BiCS8 218-Layer TLC for all three capacities7Reviewclub386.com/kioxia-exceria-pro-g2-reviewRead 15 October 2026Spec table: BiCS8 TLC, 218-layer

Not available

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

2186Reviewtomshardware.com/pc-components/ssds/kioxia-exceria-pro-g2-2tb-ssd-reviewRead 15 October 2026218-layer BiCS8 TLC7Reviewclub386.com/kioxia-exceria-pro-g2-reviewRead 15 October 20268Reviewkitguru.net/components/ssd-drives/simon-crisp/kioxia-exceria-pro-g2-4tb-pcie-5-0-ssd-review/all/1Read 15 October 2026218-layer BiCS8

Not available

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.

DRAM6Reviewtomshardware.com/pc-components/ssds/kioxia-exceria-pro-g2-2tb-ssd-reviewRead 15 October 2026A single DRAM package on the 2TB sample. The sample has 2GB of LPDDR4X and the drive has the 1GB-per-TB ratio of DRAM to flash

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

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.

2GB6Reviewtomshardware.com/pc-components/ssds/kioxia-exceria-pro-g2-2tb-ssd-reviewRead 15 October 20262TB sample has 2GB of LPDDR4X. The review says the exact memory varies from drive to drive7Reviewclub386.com/kioxia-exceria-pro-g2-reviewRead 15 October 2026Spec table: 1GB (1TB), 2GB LPDDR4X at 4,266MT/s (2TB) and 4GB (4TB). A Spanish review of the 4TB (profesionalreview.com, 2026-05-14) also reports 4GB LPDDR4X

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.

Single-sided6Reviewtomshardware.com/pc-components/ssds/kioxia-exceria-pro-g2-2tb-ssd-reviewRead 15 October 2026Single-sided drive. The 1TB and 2TB are 2280-S3-M and the 4TB is 2280-S4-M, all single-sided8Reviewkitguru.net/components/ssd-drives/simon-crisp/kioxia-exceria-pro-g2-4tb-pcie-5-0-ssd-review/all/1Read 15 October 2026The 4TB drive is a single-sided M.2 2280, with all components on one side of the PCB

Not available

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.

14,900MB/s1Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026Per capacity: 14,400 MB/s (1,024GB), 14,900 MB/s (2,048GB and 4,096GB). Footnote: CrystalDiskMark 8.0.4 x64, Q=32, T=1, best values in a specific Kioxia test environment, not warranted for individual drives2Maker spec sheet (PDF)europe.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/productbrief/KIOXIA_Exceria_Pro_G2_SSD_Product_Brief.pdfRead 15 October 2026Same per-capacity values as the product page, with the same CrystalDiskMark 8.0.4 x64 Q=32 T=1 footnote

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

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

13,400MB/s1Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026Per capacity: 12,700, 13,400 and 13,700 MB/s. Same CrystalDiskMark 8.0.4 x64, Q=32, T=1 footnote2Maker spec sheet (PDF)europe.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/productbrief/KIOXIA_Exceria_Pro_G2_SSD_Product_Brief.pdfRead 15 October 2026

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

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.

2,250,000IOPS1Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026Per capacity: 2,000,000, 2,250,000 and 2,300,000 IOPS. Footnote: 4KiB random, CrystalDiskMark 8.0.4 x64, Q=32, T=162Maker spec sheet (PDF)europe.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/productbrief/KIOXIA_Exceria_Pro_G2_SSD_Product_Brief.pdfRead 15 October 2026

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

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.

1,950,000IOPS1Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026Per capacity: 1,900,000, 1,950,000 and 1,950,000 IOPS. Same 4KiB, Q=32, T=16 footnote2Maker spec sheet (PDF)europe.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/productbrief/KIOXIA_Exceria_Pro_G2_SSD_Product_Brief.pdfRead 15 October 2026

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

Endurance and reliability

2 of 3 differ

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

1,200TB1Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026Per capacity: 600 TB, 1,200 TB and 2,400 TB. Defined under JEDEC JESD219A for the service life2Maker spec sheet (PDF)europe.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/productbrief/KIOXIA_Exceria_Pro_G2_SSD_Product_Brief.pdfRead 15 October 2026

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)

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 pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026MTTF 1.5 million hours, same for all capacities. Kioxia says it is a statistical value and not a guarantee of product life2Maker spec sheet (PDF)europe.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/productbrief/KIOXIA_Exceria_Pro_G2_SSD_Product_Brief.pdfRead 15 October 2026

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

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

Min0Max85°C1Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 20260 C (Ta) to 85 C (Tc). The minimum is an ambient temperature and the maximum a case temperature. Storage range -40 C to 85 C is not stored2Maker spec sheet (PDF)europe.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/productbrief/KIOXIA_Exceria_Pro_G2_SSD_Product_Brief.pdfRead 15 October 2026

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

Power

2 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

Not available

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

Not available

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.

50mW1Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026PS3: 50 mW (typ.)2Maker spec sheet (PDF)europe.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/productbrief/KIOXIA_Exceria_Pro_G2_SSD_Product_Brief.pdfRead 15 October 2026

Not available

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

5mW1Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026PS4: 5 mW (typ.)2Maker spec sheet (PDF)europe.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/productbrief/KIOXIA_Exceria_Pro_G2_SSD_Product_Brief.pdfRead 15 October 2026

Not available

Measured

3 of 9 differ

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

Not available

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

Not available

Not available

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

Not available

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

Not available

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

400GB9Reviewtomshardware.com/pc-components/ssds/kioxia-exceria-pro-g2-2tb-ssd-review/2Read 15 October 20262TB. 15-minute Iometer sequential write, 1MiB blocks, queue depth 32. The drive writes at over 12.6 GB/s for over 31 seconds with a cache of about 400 GB. Intel Core i9-12900K, Asus ROG Maximus Z790 Hero, drive prefilled to 50% and tested as a secondary device. The drive then holds about 2.0 GB/s in a mixed state of TLC writes plus copying data out of the cache for about 13 minutes before a steady 2.96 GB/s. The first state after the cache is that mixed state, which the review does not call TLC mode, so measured_post_cache_write_mbs is not stored

Not available

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

Not available

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.

52°C9Reviewtomshardware.com/pc-components/ssds/kioxia-exceria-pro-g2-2tb-ssd-review/2Read 15 October 20262TB with the heat-spreading label and no heatsink. The review says the drive ran as cool as a cucumber at 52 C max, more than 30 C below its 83 C warning threshold. The text does not tie the figure to one test. Primary composite sensor, about 22 C ambient, active cooling unless noted, same bench. Club386 saw 60 C and KitGuru 36 C with motherboard heatsinks in other methods

Not available

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".

2,482mW9Reviewtomshardware.com/pc-components/ssds/kioxia-exceria-pro-g2-2tb-ssd-review/2Read 15 October 20262TB, read from chart. Quarch HD Programmable Power Module idle power with ASPM/LPM disabled, 2,482 mW. Same bench. The review calls it high and says a platform with power saving on would likely read lower

Not available

Cooling and build

0 of 4 differ

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 pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026No heatsink is sold or included. The page names product labels that enhance heat dissipation

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

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

Not available

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

1 of 2 differ

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

Not available

Not available

Software

KIOXIA SSD Utility1Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026SSD Utility Management Software, listed as KIOXIA SSD Utility on the Kioxia software page, with a Windows 10 and 11 x64 download

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

Compatibility

1 of 1 differ

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 product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026Target applications: client desktops and laptops, which is stored as pc. Footnote 6 says Kioxia confirmed PS5 compatibility in its own testing against PS5 requirements. The page lists only the bare drive, and a PS5 needs a heatsink on an internal drive

Not available

Dimensions and weight

2 of 2 differ

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.

Length80.15Width22.15Height2.38mm(3.2 × 0.9 × 0.1 in)1Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026Maximum L x W x H: 80.15 x 22.15 x 2.38 mm for 1,024GB and 2,048GB, 80.15 x 22.15 x 2.63 mm for 4,096GB2Maker spec sheet (PDF)europe.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/productbrief/KIOXIA_Exceria_Pro_G2_SSD_Product_Brief.pdfRead 15 October 2026Dimension (Max: LxWxH) 80.15 x 22.15 x 2.38 mm for 1024GB and 2048GB and 2.63 mm for 4096GB

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)

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.

7.3g(0.3 oz)1Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026Drive weight 7.3 g (typ.), one figure for all capacities2Maker spec sheet (PDF)europe.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/productbrief/KIOXIA_Exceria_Pro_G2_SSD_Product_Brief.pdfRead 15 October 2026Drive Weight 7.3 g (typ.)

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

In the box

None of 2 known

In the box

Not available

Not available

Cables includediCables supplied with an external drive.

Not available

Not available

Links

Not compared

Product page

europe.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.html1Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026

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

Spec sheet

europe.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/productbrief/KIOXIA_Exceria_Pro_G2_SSD_Product_Brief.pdf2Maker spec sheet (PDF)europe.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/productbrief/KIOXIA_Exceria_Pro_G2_SSD_Product_Brief.pdfRead 15 October 2026Product Brief v.1.0, 3 pages, PDF created 2025-12-10

Not available

Manual

europe.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/KIOXIA-QSG-PRO-G2-NVMe-SSD-GLB.pdf3Owner's manualeurope.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/KIOXIA-QSG-PRO-G2-NVMe-SSD-GLB.pdfRead 15 October 2026Quick Start Guide SM023-A02, 44 pages in many languages. It covers installation of the M.2 2280 drive and safety

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

0 of 1 differ

Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

5years1Maker product pageeurope.kioxia.com/en-europe/personal/ssd/exceria-pro-g2.htmlRead 15 October 2026Up to 5 years manufacturer's warranty. It ends at the earlier of the warranty period from purchase in sealed packaging or when Percentage Life Left reaches zero. The page is the Europe site and names no country2Maker spec sheet (PDF)europe.kioxia.com/content/dam/kioxia/shared/personal/support/download/ssd/asset/productbrief/KIOXIA_Exceria_Pro_G2_SSD_Product_Brief.pdfRead 15 October 2026

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

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