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Green M.2 2280 circuit board with black controller and silver NAND chips

Western Digital

Western Digital PC SN740 256GB NVMe internal SSD

SKU CH-FW58-9P5BZ

A 256 GB PCIe 4.0 NVMe M.2 2280 internal SSD delivering up to 5150 MB/s read and 4000 MB/s write for ultra-compact devices

  • Device TypeInternal Solid State Drive (SSD)
  • Used ForIndustrial
  • Form FactorM.2 2280
  • Capacity256GB
  • Memory ComponentsPCIe
  • InterfacePCI-Express 4.0 x4
  • 256GB capacity fits ultra-compact laptops and handhelds
  • PCIe 4.0 x4 interface enables 5150MB/s sequential read speed
  • NVMe 1.4 protocol delivers 740000 IOPS random read performance
  • 1750000-hour MTBF rating backs long-term reliability
  • Low power draw extends battery life in portable devices

Compact 256GB M.2 2280 SSD

The Western Digital PC SN740 is an internal solid-state drive built in the M.2 2280 form factor. It connects through a PCI-Express 4.0 x4 interface using the NVMe 1.4 protocol and offers 256GB of capacity for ultra-compact devices.

OEM packaging means no extras

This drive ships as an OEM unit in bulk packaging without a heatsink, mounting screw, cloning software or retail box. The bare PCB measures 4.30mm high and 42.8mm wide so it fits tight slots in thin laptops, tablets, mini PCs or handheld consoles.

Suits space-constrained upgrades.

Low power draw and a 1,750,000-hour MTBF make it a good match for portable systems that value efficiency. The rated sustained sequential write of up to 5MBps and 800,000 IOPS random write are modest, so users needing continuous high-throughput writes should consider a different model.

Points forts

  • 256GB capacity fits ultra-compact laptops and handhelds
  • PCIe 4.0 x4 interface enables 5150MB/s sequential read speed
  • NVMe 1.4 protocol delivers 740000 IOPS random read performance
  • 1750000-hour MTBF rating backs long-term reliability
  • Low power draw extends battery life in portable devices

Caractéristiques

BrandWestern Digital
ModelPC SN740
Device TypeInternal Solid State Drive (SSD)
Used ForIndustrial
Form FactorM.2 2280
Capacity256GB
Memory ComponentsPCIe
InterfacePCI-Express 4.0 x4
ProtocolNVMe 1.4
Sustained Sequential WriteUp to 5MBps
4KB Random ReadUp to 740,000 IOPS
4KB Random WriteUp to 800,000 IOPS
MTBF1,750,000 hours
Ready BoostYes
HeatSinkwithout HeatSink
Height4.30mm
Width42.8mm
Depth2.75"
Weight100g

Questions sur cet article

Will the 256GB PCIe 4.0 x4 NVMe 1.4 drive need a heatsink replacement later?

The drive ships without a heatsink and has no user-replaceable thermal parts; sustained loads rely on the host device's cooling.

What is the first limit reached during sustained writes on the 256GB NVMe 1.4 SSD?

Sustained sequential write tops out at 4000 MB/s, which is the ceiling before any thermal or controller throttling would occur.

How much heat or power does the M.2 2280 NVMe 1.4 drive produce when running all day?

Designed for low power draw in ultra-compact devices, it runs cool enough for fanless ultrabooks, tablets and Steam Deck without active cooling.

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