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Silver aluminium four-bay NVMe M.2 enclosure with USB4 40Gbps connectivity

OWC

OWC Express 4M2 OWCUS4EXP4M2 four-bay NVMe M.2 2230/2242/2280 USB4 40Gbps drive enclosure

SKU CH-0WB0-HKKNC MPN OWCUS4EXP4M2

Four-bay NVMe M.2 enclosure with USB4 40Gbps connectivity and up to 3200MB/s RAID performance

  • ColorSilver
  • SizeM.2
  • TypeEnclosure
  • AC AdapterYes
  • MaterialAluminum
  • Internal InterfaceM.2 NVME M-Key
  • Up to 3200MB/s real-world speed with USB 4.0
  • Works with Thunderbolt, USB-C Macs and PCs
  • Aircraft-grade aluminium dissipates heat for steady performance
  • Smart adaptive fans run only when needed for quiet use
  • Accepts NVMe M.2 2230, 2242 and 2280 SSDs

Four-bay NVMe enclosure with USB4 40Gbps

The OWC Express 4M2 accepts up to four NVMe M.2 SSDs in 2230, 2242 or 2280 lengths. It connects via a single USB4 40Gbps USB-C cable and includes an AC power adapter. The aluminium chassis acts as a heatsink while adaptive fans run only under heavy load for near-silent operation. Builders who need more than four drives or a smaller form factor should look elsewhere.

USB4 40Gbps caps real-world throughput at 3200MB/s

The USB4 40Gbps interface limits sustained transfer rates to roughly 3200MB/s regardless of how fast the installed NVMe drives are. Thunderbolt and USB-C hosts are supported, but they will negotiate down to their own maximum speeds. Users who require the full bandwidth of PCIe Gen 4 or Gen 5 NVMe drives will not reach those speeds through this enclosure.

Replaces direct-attached M.2 slots

This enclosure upgrades a system that has no free M.2 slots or only USB 3.x ports by adding four NVMe drives at up to 3200MB/s. The jump is worth it when you need high-capacity RAID storage that moves between USB4, Thunderbolt and USB-C computers. It does not replace an internal RAID card or a Thunderbolt 3/4 enclosure that can exceed the USB4 bandwidth ceiling.

Points forts

  • Up to 3200MB/s real-world speed with USB 4.0
  • Works with Thunderbolt, USB-C Macs and PCs
  • Aircraft-grade aluminium dissipates heat for steady performance
  • Smart adaptive fans run only when needed for quiet use
  • Accepts NVMe M.2 2230, 2242 and 2280 SSDs

Caractéristiques

BrandOWC
SeriesExpress 4M2
ModelM.2 SSD Enclosure
ColorSilver
SizeM.2
TypeEnclosure
AC AdapterYes
MaterialAluminum
Internal InterfaceM.2 NVME M-Key
External InterfaceUSB 4.0 (40Gbps) (USB-C)
HDD Count Supported4 SSD
Number of Bay4
Poids d’expédition2.27 kg
Dimensions du colis264 × 208 × 79 mm

Questions sur cet article

Which M.2 lengths does the OWC Express 4M2 accept?

The enclosure supports NVMe M.2 drives in 2230, 2242 and 2280 lengths, giving you flexibility to choose the capacity and form factor that fits your workflow.

What does the 3200 MB/s figure mean when the unit is connected to a computer?

That is the real-world throughput ceiling you can expect over the USB4 40 Gbps link when the four installed SSDs are configured in a RAID array.

What does the USB4 40 Gbps interface cap in practice?

The USB4 40 Gbps connection limits total bandwidth to roughly 3200 MB/s, so even very fast NVMe drives will not exceed that aggregate speed.

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