15 Best M.2 2242 Nvme SSDs, Compared
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When shopping for the best m 2 2242 nvme SSDs, motherboard keying and protocol support determine your system compatibility. The Transcend 120GB M.2 2242 SATA SSD leads the rankings because its SATA III interface and SLC cache deliver dependable operation in legacy 42mm slots.
To help you upgrade confidently, 15 products were compared based on the specifications published on the listings. This guide helps you choose the right interface generation, capacity tier, and physical clearance for your hardware setup.
Quick picks
The best fit for you
- You need to upgrade a SATA-only M.2 slot Transcend 120GB M.2 2242 SATA SSD It features an M.2 2242 form factor, SATA III interface, and SLC caching.
- You require dedicated DRAM caching on a SATA drive Transcend 128GB M.2 2242 SATA SSD It includes a dedicated DRAM cache with a SATA III interface on a 128GB card.
- You want 1TB capacity for a SATA slot S Sharkspeed 1TB M.2 2242 SATA SSD It supplies 1TB of 3D NAND storage across a legacy SATA III interface.
- You need fast PCIe 4.0 storage for handhelds Corsair MP600 Micro 1TB Gen4 NVMe SSD It delivers PCIe 4.0 x4 transfer speeds up to 7,000MB/s sequential reads using TLC NAND.
Our 15 picks
Transcend 120GB M.2 2242 SATA SSD
Best for: SATA-only M.2 2242 slot upgrades
- Form Factor
- M.2 2242 (what this guide is about)
- Storage Capacity
- 120GB
- Interface
- SATA III 6GB/s
- Max Read Speed
- up to 560MB/sec
- Max Write Speed
- up to 500MB/sec
- Cache Type
- SLC Cache
The Transcend 120GB SATA III M.2 2242 SSD provides compact storage in a 42mm form factor. It uses a SATA III 6Gb/s interface with a B+M key, reaching read speeds up to 560MB/s and write speeds up to 500MB/s. Built with 3D TLC NAND and an SLC cache, it includes TRIM and NCQ support. You will find it suits compact systems needing a short drive limited strictly to SATA connections.
Pros
- Sequential read speeds up to 560MB/s and writes up to 500MB/s
- Equipped with 3D TLC NAND and SLC caching
- Supports TRIM, NCQ, and S.M.A.R.T. commands
- Three-year manufacturer warranty
Cons
- SATA III interface is slower than PCIe NVMe alternatives
- Small 120GB capacity limits primary drive usage
Good fit if
- You need an M.2 2242 drive wired for a SATA III B+M key slot.
- You require a basic 120GB drive with SLC caching and 3D TLC NAND.
Skip if
- You need high-speed PCIe NVMe throughput.
- You require more than 120GB of storage space.
Verdict: Transcend 120GB SATA III M.2 2242 SSD delivers standard SATA transfer rates in a space-saving 42mm footprint. It works well for legacy B+M key setups, though its speeds and capacity remain modest.
Transcend 128GB M.2 2242 SATA SSD
Best for: SATA-only M.2 2242 slots needing DRAM
- Form Factor
- M.2 2242 (what this guide is about)
- Storage Capacity
- 128GB
- Interface
- SATA III 6Gb/s
- Max Read Speed
- Up to 560MB/s
- Max Write Speed
- 350MB/s
- Cache Type
- DDR3 DRAM cache, SLC caching
This drive is an ultra-compact M.2 2242 solid-state drive built with 3D TLC NAND and a dedicated DDR3 DRAM cache. It operates strictly across the SATA III 6Gb/s interface using a B+M key, reaching up to 560MB/s read and 350MB/s write speeds. With a 70TB TBW endurance rating and DevSleep support, it suits you if you need a reliable low-power replacement drive for a space-constrained laptop or mini-PC SATA slot.
Pros
- Dedicated DDR3 DRAM cache paired with SLC caching
- Sequential read speeds up to 560MB/s and writes up to 350MB/s
- Endurance rating of 70TB TBW using 3D TLC NAND
- Supports DevSleep, TRIM, NCQ, and S.M.A.R.T. commands
Cons
- Operates over SATA III protocol and is incompatible with NVMe or PCIe slots
- Sequential write speed tops out at 350MB/s
- Base capacity is limited to 128GB
Good fit if
- You need an M.2 2242 drive for a slot wired strictly for SATA III.
- You want an onboard DDR3 DRAM cache to reduce latency on sustained tasks.
- You need a low-power compact drive supporting DevSleep for a laptop or mini-PC.
Skip if
- You have an NVMe-only or PCIe M.2 socket.
- You need high write speeds exceeding standard SATA III limits.
- You require more than 128GB of internal storage.
Verdict: Transcend 128GB M.2 2242 SATA SSD provides dedicated DRAM caching and solid endurance for space-constrained devices. It serves well as a reliable upgrade, provided your system specifically requires a legacy SATA M.2 interface rather than NVMe.
KingSpec 256GB M.2 2242 PCIe 3.0 NVMe SSD
Best for: laptop upgrades requiring PCIe 3.0 x2 slots
- Form Factor
- M.2 2242 (what this guide is about)
- Storage Capacity
- 256GB
- Interface
- PCIe 3.0 x 2
- Max Read Speed
- 1200MB/s
- Max Write Speed
- 1000MB/s
- Compatibility
- Laptop
This is a 256GB M.2 2242 NVMe drive using a PCIe 3.0 x2 interface. It delivers sequential read speeds up to 1200 MB/s and sequential write speeds up to 1000 MB/s. Built with 3D NAND in a single-sided layout, it fits compact slots requiring a B&M key. It suits you if you need a direct replacement or second drive for compatible laptops and mini PCs.
Pros
- Sequential read speeds up to 1200 MB/s and write speeds up to 1000 MB/s
- Single-sided 2242 form factor fits tight ultrabook and mini PC slots
- Supports TRIM, S.M.A.R.T., LDPC ECC, and wear-leveling technologies
- Includes a 3-year replacement warranty
Cons
- Storage capacity is limited to 256GB
- PCIe 3.0 x2 interface offers lower maximum bandwidth than x4 drives
Good fit if
- You need a 256GB single-sided drive for a compact laptop or mini PC.
- You have a slot configured for PCIe 3.0 x2 B&M key NVMe.
Skip if
- You need more than 256GB of storage space.
- You require the higher throughput available from PCIe 3.0 x4 or PCIe 4.0 drives.
Verdict: KingSpec 256GB PCIe 3.0 x2 M.2 2242 SSD provides up to 1200 MB/s read speeds in a compact single-sided format for laptop upgrades. It delivers stable storage for systems requiring B&M key NVMe compatibility.
Oemgenuine Union Memory 256GB M.2 2242 NVMe SSD
Best for: basic laptop storage expansions needing 2242 NVMe
- Form Factor
- M.2 2242 (what this guide is about)
- Storage Capacity
- 256GB
- Interface
- PCIe NVMe
- Dimensions
- 1.65 × 0.87 × 0.09 inches
View on Amazon: Oemgenuine Union Memory 256GB M.2 2242 NVMe SSD
This Oemgenuine drive is a 256GB M.2 2242 internal SSD using the PCIe NVMe interface and an M key connector. Measuring 22mm by 42mm with a thin 2.38mm profile, it fits directly into compatible laptop and desktop slots without extension brackets. If you need a compact drive for secondary storage or basic operating system tasks and have mounting hardware ready, this bulk-packaged unit provides the essential 2242 form factor.
Pros
- Native M.2 2242 form factor (22mm x 42mm x 2.38mm)
- PCIe NVMe interface with M key connector
- Compatible with both laptop and desktop systems
- Backing includes a 2-year Oemgenuine warranty
Cons
- Bulk packaging includes only the drive, with no screws or cables
- 256GB capacity limits total storage for large libraries
Good fit if
- You need a native 42mm M.2 NVMe SSD for a laptop or desktop slot.
- You already have the required mounting screw or installation hardware.
- You only require up to 256GB of drive capacity.
Skip if
- You need more storage capacity than 256GB.
- You need mounting screws, cables, or adapters included in the box.
- You require an M.2 SATA or B-key compatible drive.
Verdict: Oemgenuine 256GB M.2 2242 PCIe NVMe SSD provides a basic compact storage replacement for laptops and desktops needing an M-key 42mm drive. It arrives in bulk packaging, so you must supply your own mounting screw.
Swissbit 15GB 3D TLC M.2 PCIe SSD
Best for: embedded systems with minimal capacity requirements
- Form Factor
- M.2 2242 (what this guide is about)
- NAND Type
- TLC
This drive gives you an M.2 2242 PCIe storage solution built with 3D TLC flash memory. At 15GB of total capacity, it operates on a standard 3.3V power supply. It suits you if you run specialized, lightweight systems, dedicated embedded hardware, or small boot utilities that fit within tiny partitions. You avoid physical bulk while maintaining PCIe connectivity for low-capacity tasks.
Pros
- Compact M.2 2242 form factor
- PCIe interface support
- 3D TLC NAND flash
- Standard 3.3V operating voltage
Cons
- Very limited 15GB storage capacity
- Sequential read and write speeds unspecified
Good fit if
- You need a small 15GB boot drive for lightweight tasks.
- You require an M.2 2242 form factor with PCIe support.
Skip if
- You need to store modern operating systems or large files.
- You require published read and write transfer rates.
Verdict: Swissbit 15GB 3D TLC M.2 PCIe SSD provides a compact 15GB solution using 3D TLC NAND for minimal embedded installations. It delivers PCIe functionality where extensive storage capacity is unnecessary.
S Sharkspeed 1TB M.2 2242 SATA SSD
Best for: high-capacity M.2 SATA 2242 slot upgrades
- Form Factor
- M.2 2242 (what this guide is about)
- Storage Capacity
- 1TB
- Interface
- SATA III 6Gb/s
- Max Read Speed
- 550 MB/s
- Max Write Speed
- 500 MB/s
- Compatibility
- Laptop, Desktop
The S Sharkspeed 1TB M.2 2242 SATA SSD provides a high-capacity storage upgrade in a compact 42mm footprint. Built with 3D NAND TLC flash and a SATA III 6Gb/s interface, it delivers sequential reads up to 550 MB/s and writes up to 500 MB/s. It suits you if you need to expand an older laptop or desktop that supports M.2 SATA drives rather than faster PCIe NVMe storage.
Pros
- 1TB storage capacity in a 42mm form factor
- Sequential read up to 550 MB/s and write up to 500 MB/s
- Built-in ECC, TRIM, S.M.A.R.T., and garbage collection
- Manufacturer 5-year warranty coverage
Cons
- SATA III interface is significantly slower than NVMe alternatives
- Will not work in M.2 slots wired strictly for PCIe NVMe
Good fit if
- You need 1TB of storage in an M.2 2242 slot that accepts SATA drives.
- You want a drive backed by a 5-year warranty and TLC 3D NAND.
Skip if
- You have an NVMe-only M.2 slot that does not support the SATA protocol.
- You require the higher transfer speeds of PCIe Gen3 or Gen4 SSDs.
Verdict: S Sharkspeed 1TB M.2 2242 SATA SSD delivers maximum SATA III throughput in a compact 42mm size. It is a solid choice for upgrading compatible laptops and desktops that lack PCIe NVMe support.
S Sharkspeed 256GB Gen3 x4 M.2 2242 SSD
Best for: entry-level M.2 2242 PCIe 3.0 upgrades
- Form Factor
- M.2 2242 (what this guide is about)
- Storage Capacity
- 256GB
- Interface
- PCIe Gen 3.0x4
- Max Read Speed
- 2200MB/s
- Max Write Speed
- 1800MB/s
- Compatibility
- Laptop, Desktop
This S Sharkspeed drive is an M.2 2242 solid-state drive built for laptops and desktops with 42mm slots. It runs on a PCIe Gen 3.0 x4 NVMe interface using 3D NAND flash. With rated speeds reaching up to 2200MB/s read and 1800MB/s write, it suits you if you need a responsive operating system drive or compact storage upgrade compatible with Windows or Linux systems without demanding PCIe 4.0 bandwidth.
Pros
- Up to 2200MB/s read and 1800MB/s write speeds
- PCIe Gen 3.0 x4 NVMe interface
- 5-year warranty included
- Supports TRIM, ECC, S.M.A.R.T., and garbage collection
Cons
- Limited capacity options topping out at 256GB
- PCIe 3.0 bus speeds are slower than PCIe 4.0 options
Good fit if
- You need an M.2 2242 NVMe drive for a compact PCIe 3.0 laptop or desktop slot.
- You want basic data protection features like ECC, TRIM, and S.M.A.R.T.
Skip if
- You need more than 256GB of internal storage.
- You have a PCIe 4.0 system and want transfer speeds above 2200MB/s.
Verdict: S Sharkspeed 256GB Gen3 x4 M.2 2242 SSD delivers PCIe 3.0 x4 transfer speeds and standard maintenance features in a compact 42mm card. It provides a straightforward upgrade for small laptops and desktops that accept 256GB NVMe storage.
Transcend 256GB PCIe 4.0 M.2 2242 SSD
Best for: battery-conscious handheld gaming PCs and compact laptops
- Form Factor
- M.2 2242 (what this guide is about)
- Storage Capacity
- 256GB
- Interface
- PCIe Gen 4x4
- Max Read Speed
- 3300MB/s
- Cache Type
- SLC caching
- Dimensions
- 1.65 × 0.87 × 0.09 inches
This Transcend 256GB drive is an M.2 2242 solid-state drive built on the PCIe 4.0 x4 interface. It delivers read speeds up to 3300MB/s in a single-sided 42mm form factor, fitting tight spaces inside handhelds and compact laptops. Its DRAM-less architecture focuses on lower power consumption, backed by SLC caching and LDPC error correction. It suits you if you need a power-efficient Gen4 drive for small portable devices.
Pros
- PCIe 4.0 x4 interface reaching speeds up to 3300MB/s
- Single-sided 42mm form factor fits slim portable slots
- DRAM-less design reduces energy consumption
- Five-year limited warranty coverage
Cons
- Base capacity is limited to 256GB
- Lacks dedicated onboard DRAM cache
Good fit if
- You need a single-sided 2242 PCIe 4.0 SSD for slim handhelds or ultrabooks.
- You prioritize low power draw to conserve battery life in portable hardware.
Skip if
- You require more than 256GB of local storage space.
- You need an onboard DRAM cache for sustained heavy write workloads.
Verdict: Transcend 256GB PCIe 4.0 M.2 2242 SSD provides PCIe Gen 4x4 transfer rates and a slim single-sided layout for space-limited portable devices. Its DRAM-less build keeps power consumption low while SLC caching maintains daily responsiveness.
Corsair MP600 Micro 1TB Gen4 NVMe SSD
Best for: Lenovo Legion Go and compact Gen4 upgrades
- Form Factor
- M.2 2242 (what this guide is about)
- Storage Capacity
- 1TB
- Interface
- PCIe 4.0 x4
- Max Read Speed
- 7,000MB/sec
- Max Write Speed
- 6,200MB/sec
- Compatibility
- Laptop
The Corsair MP600 Micro 1TB is an M.2 2242 NVMe solid-state drive built for compact systems. It uses a PCIe 4.0 x4 interface and high-density 3D TLC NAND flash to reach sequential read speeds up to 7,000MB/s and sequential write speeds up to 6,200MB/s. It fits thin laptops and handhelds like the Lenovo Legion Go, making it a direct match if you need high Gen4 throughput in a small slot.
Pros
- Up to 7,000MB/s sequential read and 6,200MB/s sequential write speeds
- Compact M.2 2242 form factor suited for handhelds like Lenovo Legion Go
- Uses high-density 3D TLC NAND flash
- Backward compatible with PCIe Gen3 systems
Cons
- Reduced speeds when running on PCIe Gen3 hosts
- Requires an M.2 2242 slot rather than standard 2280 bays
Good fit if
- You need high Gen4 read speeds up to 7,000MB/s in a 42mm M.2 slot.
- You want a 1TB 3D TLC upgrade for a Lenovo Legion Go or thin laptop.
Skip if
- You only have an older PCIe Gen3 slot and want to avoid reduced speeds.
- You require a full-length M.2 2280 drive for standard desktop installation.
Verdict: Corsair MP600 Micro 1TB Gen4 NVMe SSD pairs high-speed PCIe 4.0 x4 performance with 3D TLC NAND in a small 42mm footprint. It delivers up to 7,000MB/s sequential reads for compact machines like the Lenovo Legion Go.
KingSpec 512GB PCIe 3.0 M.2 2242 SSD
Best for: compact PCIe 3.0 laptop and handheld upgrades
- Form Factor
- M.2 2242 (what this guide is about)
- Storage Capacity
- 512GB
- Interface
- PCIe 3.0
- Max Read Speed
- Up to 3500 MB/s
- Compatibility
- Laptop, Desktop
- NAND Type
- 3D NAND
The KingSpec 512GB M.2 2242 NVMe SSD gives you 3D NAND storage in a compact 42mm form factor. It operates on a PCIe 3.0 interface to deliver sequential read speeds up to 3500 MB/s. This drive suits you if you need to upgrade a space-constrained laptop, mini PC, or handheld console running Windows or Linux. It includes built-in dynamic thermal throttling and features a 1.2 million hour MTBF alongside a 5-year limited warranty.
Pros
- Up to 3500 MB/s sequential read speed
- Compact 42mm length for small devices
- Dynamic thermal throttling built in
- 5-year limited warranty and 1.2M hours MTBF
Cons
- PCIe 3.0 interface rather than faster Gen4
- Sequential write speeds are not specified
Good fit if
- You need a compact 42mm drive with up to 3500 MB/s read speeds.
- You want a 512GB PCIe 3.0 NVMe SSD backed by a 5-year warranty.
Skip if
- You require faster PCIe 4.0 data transfer bandwidth.
- You need published sequential write speed specifications before buying.
Verdict: KingSpec 512GB PCIe 3.0 M.2 2242 SSD delivers strong Gen3 read performance of up to 3500 MB/s for compact laptops and handhelds. Its dynamic thermal throttling and 5-year warranty make it a dependable choice for space-limited upgrades.
OSCOO 512GB M.2 2242 SATA SSD
Best for: SATA-based M.2 2242 laptop and mini PC upgrades
- Form Factor
- M.2 2242 (what this guide is about)
- Storage Capacity
- 512GB
- Interface
- SATA III
- Max Read Speed
- Up to 550MB/s
- Max Write Speed
- Up to 500MB/s
- Dimensions
- 3.15 × 0.87 × 0.35 inches
The OSCOO 512GB M.2 2242 SATA SSD provides legacy storage expansion in a compact 42mm footprint. It runs on the SATA III interface, reaching sequential speeds up to 550MB/s read and 500MB/s write. Data protection features include LDPC ECC, TRIM, and SMART monitoring. If you need replacement storage for a mini PC, laptop, or desktop with a dedicated SATA-based M.2 2242 slot rather than an NVMe slot, this drive matches those exact hardware requirements.
Pros
- Sequential read speeds up to 550MB/s and write speeds up to 500MB/s
- Compact M.2 2242 form factor fits space-constrained laptops and mini PCs
- Built-in LDPC ECC, TRIM, SMART, and wear leveling support
Cons
- Uses SATA III interface rather than faster NVMe protocols
- Incompatible with NVMe-only M.2 slots
Good fit if
- You have an M.2 2242 slot wired specifically for SATA III.
- You need a 512GB drive for mini PCs like Intel NUC or Zotac ZBOX.
Skip if
- You have an NVMe-only M.2 slot.
- You require transfer speeds above the SATA III 550MB/s limit.
Verdict: OSCOO 512GB M.2 2242 SATA SSD delivers standard SATA III transfer rates for small-form-factor systems needing 42mm drives. It provides dependable utility if your motherboard requires legacy SATA signalling over an M.2 connection.
Samsung 512GB PCIe 4.0 M.2 2242 SSD
Best for: compact laptops needing PCIe 4.0 2242 storage
- Form Factor
- M.2 2242 (what this guide is about)
- Storage Capacity
- 512GB
- Interface
- PCIe Gen4x4
- Max Read Speed
- 3500MB/s
- NAND Type
- TLC
- Dimensions
- 1.65 × 0.87 × 0.09 inches
This drive is an M.2 2242 NVMe solid-state drive built with 3D TLC NAND flash and a PCIe 4.0 x4 interface. It delivers sequential read speeds up to 3500MB/s in a compact 42mm footprint. If you need a power-efficient Gen4 storage upgrade for a thin-and-light laptop, mini PC, or compact system requiring 2242 cards, this OEM module fits your setup.
Pros
- PCIe Gen4x4 interface with sequential read speeds up to 3500MB/s
- Uses 3D TLC NAND flash
- Compact 2242 form factor designed for mini PCs and thin laptops
- Low power consumption profile for mobile computing
Cons
- OEM hardware removed from prebuilt systems rather than retail boxed
- Sequential write speed is not stated in official specs
- Capacity tops out at 512GB for this specific model
Good fit if
- You need an M.2 2242 PCIe 4.0 SSD for a compact laptop or mini PC.
- You want 3D TLC NAND storage with sequential reads up to 3500MB/s.
- You are comfortable installing an OEM pull drive taken from a new system.
Skip if
- You require factory-sealed retail packaging and direct retail support.
- You need 1TB or more storage capacity on a single card.
- Your motherboard only accepts SATA-based M.2 2242 drives.
Verdict: Samsung 512GB PCIe 4.0 M.2 2242 SSD is a compact Gen4 storage option delivering up to 3500MB/s sequential read speeds with 3D TLC NAND. It serves as a dependable replacement module for small laptops and mini PCs requiring the 42mm form factor.
SK hynix 512GB PCIe 4.0 M.2 2242 SSD
Best for: compact laptops and mini PCs needing Gen4 storage
- Form Factor
- M.2 2242 (what this guide is about)
- Storage Capacity
- 512GB
- Interface
- PCIe Gen4 x4
- Cache Type
- Host Memory Buffer (HMB)
- Dimensions
- 1.65 × 0.87 × 0.09 inches
This internal drive gives you 512GB of storage in a compact M.2 2242 form factor measuring 1.65 inches long. It operates across a PCIe Gen4 x4 interface and features TLC NAND flash paired with Host Memory Buffer technology. Sourced as an OEM pull from unused systems, it suits you if you need a short Gen4 drive for a compatible laptop, notebook, or mini PC upgrade.
Pros
- PCIe Gen4 x4 interface
- Compact 42mm (1.65-inch) M.2 2242 form factor
- TLC NAND flash memory
- Host Memory Buffer (HMB) support
Cons
- OEM drive removed from pre-built systems
- Uses Host Memory Buffer instead of dedicated DRAM
- Maximum capacity is 512GB
Good fit if
- You have an M.2 2242 slot that supports PCIe Gen4 x4 speeds.
- You want TLC NAND flash in a 42mm form factor.
- You need a 512GB drive for a mini PC or compact laptop.
Skip if
- You need more than 512GB of storage capacity.
- You prefer a retail-packaged SSD over an OEM system pull.
- You want an SSD with dedicated onboard DRAM cache.
Verdict: SK hynix 512GB PCIe 4.0 M.2 2242 SSD provides TLC NAND and PCIe Gen4 x4 capability in a 42mm form factor. It delivers a solid compact upgrade if you are comfortable using an OEM surplus drive.
Samsung 512GB NVMe M.2 2242 SSD
Best for: Everyday productivity in compact M-Key laptops
- Form Factor
- M.2 2242 (what this guide is about)
- Storage Capacity
- 512GB
- Interface
- PCIe Gen3 x4
- Max Read Speed
- Up to 2200MB/s
- Cache Type
- Host Memory Buffer
- Dimensions
- 1.65 × 0.87 × 0.09 inches
This Samsung internal drive provides 512GB of storage in a compact M.2 2242 footprint. It uses a PCIe Gen3 x4 interface with an M-Key connection, delivering sequential read speeds up to 2200MB/s. Built with 3-bit V-NAND and Host Memory Buffer support, it fits small systems like mini PCs or compatible laptops. You get reliable everyday transfer rates for productivity tasks without taking up standard drive space.
Pros
- Sequential read speeds up to 2200MB/s
- PCIe Gen3 x4 interface with M-Key design
- Built with Samsung 3-bit V-NAND
- Supports Host Memory Buffer technology
Cons
- OEM drive pulled from pre-built systems
- Gen3 speeds reach lower peaks than Gen4 options
- Capacity tops out at 512GB for this form factor
Good fit if
- You need a 512GB M.2 2242 drive with an M-Key interface.
- You want PCIe Gen3 x4 read speeds up to 2200MB/s.
- You are upgrading a compact laptop, tablet, or mini PC.
Skip if
- You require faster PCIe Gen4 data transfer rates.
- You need more than 512GB of storage capacity.
- You prefer retail-packaged hardware over an OEM pull.
Verdict: Samsung 512GB NVMe M.2 2242 SSD delivers dependable PCIe Gen3 x4 performance up to 2200MB/s for space-limited systems. It serves as a practical 512GB replacement for everyday computing in compatible M-Key slots.
Micron 2500 1TB M.2 2242 SSD
Best for: high-capacity Gen4 M.2 2242 laptop upgrades
- Form Factor
- M.2 2242 (what this guide is about)
- Storage Capacity
- 1TB
- Interface
- PCIe Gen4 x4
- Max Read Speed
- Up to approximately 6,900MB/s
- Max Write Speed
- 5,900MB/s
- Cache Type
- Host Memory Buffer (HMB)
This Micron 2500 drive gives you 1TB of storage in an M.2 2242 form factor using QLC NAND flash. It runs on a PCIe Gen4 x4 interface, reaching sequential speeds up to 6,900 MB/s read and 5,900 MB/s write. A DRAM-less controller relies on Host Memory Buffer support. It suits you if you need high-capacity 42mm storage for a compatible laptop or mini PC.
Pros
- Sequential read speeds up to 6,900 MB/s and write speeds up to 5,900 MB/s
- PCIe Gen4 x4 interface in a compact 42mm form factor
- Host Memory Buffer (HMB) support for system responsiveness
Cons
- Uses QLC NAND instead of TLC flash
- DRAM-less architecture with no onboard cache
- OEM drive removed from pre-built systems
Good fit if
- You need 1TB of storage in a compact 42mm M.2 slot.
- You have a system supporting PCIe Gen4 x4 speeds.
- You want high sequential read rates for fast application loading.
Skip if
- You prefer TLC NAND over QLC flash.
- You need an SSD with dedicated onboard DRAM cache.
- You want standard retail packaging instead of an OEM pull.
Verdict: Micron 2500 1TB M.2 2242 SSD pairs Gen4 transfer speeds with 1TB of compact QLC storage for space-constrained systems. It delivers fast everyday throughput despite its DRAM-less design.
Specifications side by side
| Spec | Transcend 120GB M.2 2242 SATA SSD | Transcend 128GB M.2 2242 SATA SSD | KingSpec 256GB M.2 2242 PCIe 3.0 NVMe SSD | Oemgenuine Union Memory 256GB M.2 2242 NVMe SSD | Swissbit 15GB 3D TLC M.2 PCIe SSD | S Sharkspeed 1TB M.2 2242 SATA SSD | S Sharkspeed 256GB Gen3 x4 M.2 2242 SSD | Transcend 256GB PCIe 4.0 M.2 2242 SSD | Corsair MP600 Micro 1TB Gen4 NVMe SSD | KingSpec 512GB PCIe 3.0 M.2 2242 SSD | OSCOO 512GB M.2 2242 SATA SSD | Samsung 512GB PCIe 4.0 M.2 2242 SSD | SK hynix 512GB PCIe 4.0 M.2 2242 SSD | Samsung 512GB NVMe M.2 2242 SSD | Micron 2500 1TB M.2 2242 SSD |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Storage Capacity | 120GB | 128GB | 256GB | 256GB | not specified | 1TB | 256GB | 256GB | 1TB | 512GB | 512GB | 512GB | 512GB | 512GB | 1TB |
| Interface | SATA III 6GB/s | SATA III 6Gb/s | PCIe 3.0 x 2 | PCIe NVMe | not specified | SATA III 6Gb/s | PCIe Gen 3.0x4 | PCIe Gen 4x4 | PCIe 4.0 x4 | PCIe 3.0 | SATA III | PCIe Gen4x4 | PCIe Gen4 x4 | PCIe Gen3 x4 | PCIe Gen4 x4 |
| Form Factor | not specified | not specified | M.2 2242 | M.2 2242 | not specified | M.2 2242 | M.2 2242 | 2242 | M.2 2242 | not specified | not specified | not specified | not specified | not specified | not specified |
| Max Read Speed | up to 560MB/sec | Up to 560MB/s | 1200MB/s | not specified | not specified | 550 MB/s | 2200MB/s | 3300MB/s | 7,000MB/sec | Up to 3500 MB/s | Up to 550MB/s | 3500MB/s | not specified | Up to 2200MB/s | Up to approximately 6,900MB/s |
| Max Write Speed | up to 500MB/sec | 350MB/s | 1000MB/s | not specified | not specified | 500 MB/s | 1800MB/s | not specified | 6,200MB/sec | not specified | Up to 500MB/s | not specified | not specified | not specified | 5,900MB/s |
| Cache Type | SLC Cache | DDR3 DRAM cache, SLC caching | not specified | not specified | not specified | not specified | not specified | SLC caching | not specified | not specified | not specified | not specified | Host Memory Buffer (HMB) | Host Memory Buffer | Host Memory Buffer (HMB) |
| Compatibility | not specified | not specified | Laptop | not specified | not specified | Laptop, Desktop | Laptop, Desktop | not specified | Laptop | Laptop, Desktop | not specified | not specified | not specified | not specified | not specified |
| NAND Type | not specified | not specified | not specified | not specified | TLC | 3D NAND | 3D NAND | not specified | TLC | 3D NAND | not specified | TLC | not specified | not specified | QLC |
| Size | 120GB | 128GB | 256GB | Union | 3rd Gen | not specified | 1TB | 256GB | Gen4x4 | 1TB | 512GB | 512GB | PM9B1|512GB | PCIe Gen4 512GB|2242 | 512GB|2242 | not specified |
| Dimensions | 0.87 × 0.15 × 3.15 inches | 1.65 × 0.87 × 0.14 inches | not specified | 1.65 × 0.87 × 0.09 inches | not specified | not specified | not specified | 1.65 × 0.87 × 0.09 inches | 0.87 × 1.65 × 0.12 inches | 1.65 × 1.65 × 1.65 inches | 3.15 × 0.87 × 0.35 inches | 1.65 × 0.87 × 0.09 inches | 1.65 × 0.87 × 0.09 inches | 1.65 × 0.87 × 0.09 inches | 1.65 × 0.87 × 0.09 inches |
| Color | Multicoloured | Green | 22x42mm | not specified | not specified | M.2 2242 NGFF | M.2 2242 NVME SSD | Black | Black | not specified | Blue | PCIe 4.0 2242 | not specified | not specified | not specified |
| Model | TS120GMTS420S | TS128GMTS430S | 6d6f20d0-ccc5-44f5-b027-3a9c6e9a0ca0 | RPJTJ256MED1OWX | not specified | e7a9d1b2-f586-4b52-9707-735215ae90db | not specified | TS256GMTE410S | CSSD-F1000GBMP600MCR2 | 43996bad-d3bd-4c17-b92a-4eee3025657d | ON800 | PM9B1 512GB SSD | HFS512GEM4X169N | Samsung PM991a | Micron 2500 MTFDKCD1T0QGN |
Is an M.2 2242 SSD worth it?
Choosing an M.2 2242 SSD matters primarily for physical fit inside compact hardware. At 42 millimeters long, this form factor fits tight internal layouts found in handheld gaming consoles, mini PCs, and thin laptops. Despite the small footprint, drives in this class offer capacities up to 1TB and interfaces ranging from SATA III up to PCIe 4.0 x4 speeds reaching 7,000MB/s. If your device only accepts a 42mm card, this specific size is required to secure the drive to the motherboard mounting post.
Worth it if
- You own a handheld console, mini PC, or laptop designed strictly for a 42mm mounting position.
- You need up to 1TB of solid-state storage inside a space-constrained system enclosure.
Skip it if
- You have clearance and screw mounts for a longer standard M.2 2280 drive.
- You need storage capacities greater than 1TB for your system.
If you balance home hardware needs with computing components, motor power ratings differentiate the best blenders with 2 Speeds across standard kitchen appliance specifications.
How We Selected These SSDs
You find these drives by checking Amazon listings that state the M.2 2242 form factor in their title or feature list. This identifies models built specifically for 42mm slots across SATA and PCIe interfaces. To keep the comparison clear, only one size or variant of the same product family is shown.
All details come directly from specifications and feature lists published on the listings. No products are physically handled. To help you browse, the 15 items are ordered with products in stock first. Prices and stock refresh at least daily.
How to Choose an M.2 2242 SSD
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Verify PCIe Generation and Lanes
Review your motherboard manual to identify its supported PCIe revision and lane count. An entry-level drive like the KingSpec 256GB PCIe 3.0 NVMe SSD runs on PCIe 3.0 x2, topping out around 1200 MB/s. In contrast, Gen4 drives utilize four lanes to reach speeds up to 7000 MB/s. Installing a Gen4 drive into a Gen3 or two-lane slot limits performance to the slowest link. Check your device specifications to match drive throughput to your host slot.
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Select the Right NAND Type
Evaluate the flash architecture used on the drive before buying. Most performance-oriented M.2 2242 drives use triple-level cell 3D TLC flash, which balances endurance and sustained write stability. Other high-capacity options, such as the Micron 2500 1TB SSD, rely on quad-level cell QLC flash. QLC stores more data per cell to provide higher capacities in small layouts, but it generally features lower write endurance under continuous heavy workloads. Choose TLC for intensive writes and QLC for lighter secondary storage.
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Check the Cache Architecture
Determine how the drive manages write operations and lookup tables. Compact M.2 2242 cards frequently use DRAM-less designs to save board space and conserve battery life in portable setups. A drive like the Transcend 256GB PCIe 4.0 SSD relies on an SLC cache to deliver snappy temporary write bursts without dedicated DRAM. If your daily routine involves sustained large file transfers or heavy multitasking, look for models featuring onboard DRAM cache chips to maintain continuous write stability over extended sessions.
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Measure Z-Height Component Clearance
Check the physical thickness and layout clearance of your target slot. M.2 2242 drives vary in thickness depending on whether chips reside on one or both sides of the printed circuit board. Ultrathin laptops and handheld gaming systems often strictly accept single-sided drives with heights under 0.1 inches, such as the Samsung 512GB PCIe 4.0 SSD at 0.09 inches. Double-sided modules or thick thermal labels can bend or fail to seat in tight slots, risking damage to motherboard connectors.
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Confirm Thermal Management Features
Examine thermal control specifications if you install the drive in confined enclosures. Handheld gaming consoles and ultra-compact laptops provide restricted airflow, causing small solid-state drives to warm up rapidly under load. Drives like the KingSpec 512GB PCIe 3.0 M.2 SSD incorporate dynamic thermal throttling to adjust transfer speeds automatically when temperatures spike. Without built-in thermal safeguards or an integrated heat spreader, drives placed in tight enclosures can overheat during continuous read and write tasks, triggering sudden system instability.
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Inspect Packaging and Mounting Screws
Review what hardware arrives inside the box before beginning your installation. Many M.2 2242 drives are produced as OEM surplus or sold in simple bulk packaging. For instance, the Oemgenuine Union Memory 256GB SSD ships in bulk packaging and does not include an M.2 mounting screw. If your device lacks an existing fastener on the motherboard standoff, you will need to obtain the correct screw separately prior to mounting the card. Always verify package contents to prevent mid-upgrade delays.
Frequently asked questions
What is the highest read speed available in an M.2 2242 NVMe SSD?
The highest sequential read speed reaches up to 7,000 MB/s. The Corsair MP600 Micro 1TB Gen4 NVMe SSD achieves this throughput using a PCIe 4.0 x4 interface and TLC NAND. By comparison, PCIe 3.0 drives on the list report lower maximum speeds, such as 2,200 MB/s for the Samsung PM991a and 3,500 MB/s for the KingSpec 512GB model.
Can you install an M.2 2242 SSD into the Lenovo Legion Go?
Yes, specific 42mm drives match the hardware requirements of the Lenovo Legion Go. The Corsair MP600 Micro 1TB Gen4 NVMe SSD is specifically designated for this gaming device. Because handheld consoles have strict physical limits, you must verify the drive uses a compact 42mm card length and an appropriate PCIe Gen4 interface before installing.
What is the difference between TLC and QLC flash in 2242 drives?
TLC and QLC represent different density configurations of 3D NAND flash memory. For example, among high-capacity 1TB models, the Corsair MP600 Micro utilizes 3D TLC NAND, whereas the Micron 2500 uses QLC NAND. TLC typically holds fewer bits per cell than QLC, which influences how data writes are managed during sustained file operations in space-constrained SSDs.
Do all M.2 2242 SSDs come with installation screws?
No, some compact replacement drives arrive without extra mounting hardware. For instance, the Oemgenuine Union Memory 256GB M.2 2242 NVMe SSD ships in bulk packaging and requires you to provide your own mounting screw. You must check whether your laptop or motherboard already includes a retaining screw before beginning your storage upgrade.
What is the highest storage capacity offered in the M.2 2242 form factor?
The highest capacity available in this form factor is 1TB. You can obtain 1TB of storage on both NVMe and SATA protocols, such as the Corsair MP600 Micro Gen4 card, the Micron 2500 PCIe 4.0 drive, and the S Sharkspeed SATA III model. Other listed drives range from 120GB and 128GB up to 512GB.
How do DRAM and DRAM-less designs compare in M.2 2242 SSDs?
Drives with dedicated DRAM integrate an independent onboard memory chip, whereas DRAM-less drives employ SLC caching to manage performance. The Transcend 128GB SATA SSD includes a dedicated DRAM cache. In contrast, models like the Transcend 256GB PCIe 4.0 card omit DRAM to minimize power consumption in portable devices while using SLC caching for responsiveness.
What are the exact physical dimensions of an M.2 2242 SSD?
An M.2 2242 SSD measures approximately 22 millimeters wide by 42 millimeters long. In imperial dimensions, this equals roughly 0.87 inches in width and 1.65 inches in length, as specified on models like the Samsung PM9B1 and SK hynix 512GB. Thickness remains slim, measuring around 0.09 inches on single-sided configurations.