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SAMSUNG 512GB M.2 2242 42mm PM991 NVMe PCIe Gen 4 x4 TLC SSD (MZALQ512HALU) for Dell HP Lenovo Laptop Ultrabook Tablet - Internal Solid State Drive (OEM New)

SAMSUNG 512GB M.2 2242 42mm PM991 NVMe PCIe Gen 4 x4 TLC SSD (MZALQ512HALU)

Bottom line: The SAMSUNG 512GB M.2 2242 42mm PM991 NVMe PCIe Gen 4 x4 TLC SSD is a specs-and-price decision rather than a crowd-consensus one in the ssds & storage category, priced around $144.80 on Amazon as of 2026-10-07. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

$144.80

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Buy on Amazon — $144.80 Compare to similar ssds & storage

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For SSDs and PC storage upgrades, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

Before you buy

  • Confirm socket / form-factor / power-rating compatibility against your build before ordering
  • Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated

Manufacturer description

MZALQ512HALU 512GB SSD PC PM991 M.2 2242 42mm NVMe PCIe Gen4 x4 Solid State DriveCapacity: 512GBForm Factor: M.2 2242 PCIe NVME SSDKey Type: M KeyHardware Requirements: M.2 slotDimension: 22mm x 42mm x 2.38mSize: Fits 2242 as is; Will fit 2260 & 2242, 2280 with adapter (Adapter NOT INCLUDED)Compatibility: Laptop & Desktop CompatibleIncluded: Bulk Packaging - Only the Drive is included. Any screws, cables, or adapter needed are sold separatelyNOT Compatible with ThinkPad P50s P51s P52s P40s P41s P42s

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SpecPicks Verdict

SpecPicks scored SAMSUNG 512GB M.2 2242 42mm PM991 NVMe PCIe Gen 4 x4 TLC SSD using a rating × review-volume × price-fit model applied to published specs and reviews across the ssds & storage category. Compare with similarly-priced alternatives in the ssds & storage category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for ssds & storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • Please be noted this SSD only support the laptops that come with PCIe SSD slot, Some older Lenovo ThinkPad P series like P51, P50, P52, P52s, P50s,P51s which only support 2242 M.2 SATA SSD. Dimension: 22mm x 42mm x 2.38mm / Key Type: M Key
  • Interface: NVMe PCIe Gen 4 x 4; Keep your SSD running at its peak with Full Power Mode, which drives continuous and consistent high performance, compatible with PCIe Gen3 x4
  • Size: Fits 2242 as is / Compatibility: Laptop & Desktop Compatible Sequential read/write up to (MB/s): 3100/2000; Random read/write up to (IOPS): 380K/330K
  • Form factor: M.2 2242 (22mm x 42mm); Whether you need a boost for gaming or a seamless workflow for heavy graphics, the PM991 is a smart choice for outstanding SSD performance.

Full Specifications

SizeFits 2242 as is / Compatibility: Laptop & Desktop Compatible Sequential read/write up to (MB/s): 3100/2000; Random read/write up to (IOPS): 380K/330K
BrandSamsung
ColorBlack
Model Name‎Samsung PM991 Series
Form FactorM.2 2242
Media Speed3100 megabits_per_second
Model NumberMZALQ512HALU
Built-In MediaSamsung PM991 512GB SSD
Hard-Drive Size512 GB
Mfr Part NumberMZALQ512HALU
Number of Items1
Special FeaturePortable
Installation TypeInternal Hard Drive
Compatible DevicesDesktop, Tablet
Data Transfer Rate2000 megabytes_per_second
Enclosure MaterialNand
Additional FeaturesPortable
Hard Disk InterfaceSolid State
Warranty Description1 year
Hard Disk DescriptionSolid State Drive
Full listing titleSAMSUNG 512GB M.2 2242 42mm PM991 NVMe PCIe Gen 4 x4 TLC SSD (MZALQ512HALU) for Dell HP Lenovo Laptop Ultrabook Tablet - Internal Solid State Drive (OEM New)

Ready to buy?

SAMSUNG 512GB M.2 2242 42mm PM991 NVMe PCIe Gen 4 x4 TLC SSD (MZALQ512HALU) for Dell HP Lenovo Laptop Ultrabook Tablet - Internal Solid State Drive (OEM New) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $144.80

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

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SAMSUNG 512GB M.2 2242 42mm PM991 NVMe PCIe Gen 4 x4 TLC SSD (MZALQ512HALU) for Dell HP Lenovo Laptop Ultrabook Tablet - Internal Solid State Drive (OEM New)
$144.80
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