Nominal host interface
40 Gb/s
This is not a file-transfer benchmark. The host, bridge, cable and SSD can each limit results.
OWC / NVMe enclosures
OWC Express 1M2
The empty 40 Gb/s USB4 enclosure supports a bounded set of M.2 NVMe sizes and includes its assembly tools.
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At a glance
M.2 SATA support
No
A matching connector or length does not establish SATA support. Unknown is not a confirmed no.
Source · 2026-10-11
OWC: Express 1M2 40Gb/s enclosure specificationsChecked 2026-10-11. We reviewed the official page text on the check date. Checkout options were not verified.Included SSDs
0 drives
These selections are empty enclosures. A populated bundle is a different package.
Source · 2026-10-11
OWC: Express 1M2 40Gb/s enclosure specificationsChecked 2026-10-11. We reviewed the official page text on the check date. Checkout options were not verified.The purchase package
Express 1M2 (US selection)
Empty enclosure only; supply a compatible SSD separately. No current stock or checkout test is claimed.
Source · 2026-10-11
OWC: Express 1M2 40Gb/s enclosure specificationsChecked 2026-10-11. We reviewed the official page text on the check date. Checkout options were not verified.Select: Express 1M2 40Gb/s DIY enclosure only, US selection; no SSD, not 80G.
View at OWC — Express 1M2 (US selection); opens in a new tabThe link may open several packages. Check current price and availability with the seller. Opens in a new tab.
Specifications & sources
Single-drive enclosure-only packages. Ready-to-use portable SSDs, multi-drive RAID and unspecified populated bundles are outside this set.
Open a field explanation or source for its conditions.
| Compare the details | Express 1M2 (US selection) |
|---|---|
| US purchase package | Express 1M2 40Gb/s DIY enclosure only, US selection; no SSD, not 80G. Empty enclosure only; supply a compatible SSD separately. No current stock or checkout test is claimed. Source · 2026-10-11OWC: Express 1M2 40Gb/s enclosure specificationsChecked 2026-10-11. We reviewed the official page text on the check date. Checkout options were not verified. |
| External rating | |
Nominal host interfaceThe advertised maximum host-link rate. This is not a file-transfer benchmark. The host, bridge, cable and SSD can each limit results. | 40 Gb/sSource · 2026-10-11OWC: Express 1M2 40Gb/s enclosure specificationsChecked 2026-10-11. We reviewed the official page text on the check date. Checkout options were not verified. |
Supported drive protocolDocumented SSD protocols for the enclosure. M.2 describes a physical format; NVMe and SATA are different protocols. Match both. | M.2 NVMe.Source · 2026-10-11OWC: Express 1M2 40Gb/s enclosure specificationsChecked 2026-10-11. We reviewed the official page text on the check date. Checkout options were not verified. |
M.2 SATA supportWhether SATA drives are explicitly supported. A matching connector or length does not establish SATA support. Unknown is not a confirmed no. | NoSource · 2026-10-11OWC: Express 1M2 40Gb/s enclosure specificationsChecked 2026-10-11. We reviewed the official page text on the check date. Checkout options were not verified. |
Supported M.2 lengthsDocumented length codes and any source disagreement. Check both the mounting position and component clearance, especially for double-sided drives. | 2230, 2242 and 2280; single- or double-sided drives.Source · 2026-10-11OWC: Express 1M2 40Gb/s enclosure specificationsChecked 2026-10-11. We reviewed the official page text on the check date. Checkout options were not verified. |
Included SSDsStorage drives supplied with the exact purchase option. These selections are empty enclosures. A populated bundle is a different package. | 0 drivesSource · 2026-10-11OWC: Express 1M2 40Gb/s enclosure specificationsChecked 2026-10-11. We reviewed the official page text on the check date. Checkout options were not verified. |
Drive installationThe documented enclosure opening and drive-retention method. Tool-free does not eliminate thermal-pad placement or careful handling of the SSD. | Screw-secured assembly; screwdriver included.Source · 2026-10-11OWC: Express 1M2 40Gb/s enclosure specificationsChecked 2026-10-11. We reviewed the official page text on the check date. Checkout options were not verified. |
Cooling arrangementDocumented enclosure materials and heat-transfer components. A heat sink is not proof of sustained speed or that every drive avoids throttling. | Aluminum passive heat-sink enclosure.Source · 2026-10-11OWC: Express 1M2 40Gb/s enclosure specificationsChecked 2026-10-11. We reviewed the official page text on the check date. Checkout options were not verified. |
Included host cablesCable contents established for the selected package. A cable that fits physically may not support the advertised rate. Regional packing lists remain separate. | 0.3 m USB-C 40Gb/s cable.Source · 2026-10-11OWC: Express 1M2 40Gb/s enclosure specificationsChecked 2026-10-11. We reviewed the official page text on the check date. Checkout options were not verified. |
Host requirementsRequired interface and operating conditions. Using a faster host port does not upgrade the enclosure bridge. Formatting and file-system support are separate. | USB4 or the documented Thunderbolt host path is needed for the top link mode; legacy USB hosts can run at a lower rate.Source · 2026-10-11OWC: Express 1M2 40Gb/s enclosure specificationsChecked 2026-10-11. We reviewed the official page text on the check date. Checkout options were not verified. |
Explicit compatibility limitsImportant exclusions and capacity or revision conditions. Use the exact drive and enclosure revision. Do not treat a generic NVMe label as universal compatibility. | Select the enclosure-only 40Gb/s version, not Express 1M2 80G. Verify the drive length; 2260 is not in this reviewed list.Source · 2026-10-11OWC: Express 1M2 40Gb/s enclosure specificationsChecked 2026-10-11. We reviewed the official page text on the check date. Checkout options were not verified. |
| Questions to check before buying | Read the source notes for the exact package and operating conditions. |