OWC Accelsior 4M2 PCIe M.2 NVMe SSD

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Supercharge your compatible Mac Pro with the 4TB Accelsior 4M2 PCIe M.2 NVMe SSD from OWC / Other World Computing. Ready to meet your data-intensive, high-bandwidth needs, the Accelsior 4M2 installs into a full-height, half-length x8 or x16 PCIe 3.0 or 2.0 slot and uses 3D TLC synchronous NAND flash memory with advanced SLC caching and a Phison E12 controller. All these elements combine to deliver sequential read and write speeds of up to 6318 and 6775 MB/s respectively.

Accelsior 4M2 comes with SoftRAID software to help you manage your data. You can maximize drive space, get the fastest access speeds, and protect against drive failure with plug-and-play simplicity. An easy setup makes it a breeze to create RAID volumes, walking you through the process of customizing the speed and redundancy settings of your data volume.

Key Features

Compatible Mac Pro 2019, 2012 and 2010, and select Windows PC towers
Installs into a full-height, half-length x8 or x16 PCIe 3.0 or 2.0 slot
4TB capacity for footage, images, files, and games
Up to 6318 and 6775 MB/s reads and writes in RAID 0
Includes SoftRAID software for creating, monitoring, and managing advanced RAID sets
Built-in ECC
Plug and play-no drivers needed
Silent cooling-finned heat sink cover for fanless operation
Compatible with macOS 10.13 High Sierra, macOS 10.14 Mojave, and macOS 10.15 Catalina
Compatible with Windows 10 32- and 64-bit and Windows Server 2016
Compatible with Akitio Node Duo and Node Lite
Suitable for data-intensive, high-bandwidth applications such as large format video editing, VR/AR/MR, high transactional and complex calculation applications, and extreme gaming


Stream and edit high-resolution video and graphics files without glitches
Experience faster previews, renders, and processing in VFX programs
Keep page scenery and textures looking sharp and flowing uninterrupted in virtual reality environments
Ensure augmented reality visualizations look lifelike
Change game levels seamlessly and play flight/driving/MMO games with continuously changing scenery and heavily personal-preference-modded games without micro-stuttering
Box ContentsOWC 4TB Accelsior 4M2 PCIe M.2 NVMe SSD
Box Dimensions (LxWxH)9.3 x 6.4 x 3.1"
CertificationsCE, RoHS, as per Manufacturer
Endurance (Total Bytes Written)1665 TB
Flash ControllerPhison E12
Flash Memory TypeSynchronous 3D NAND
Form FactorLow-Profile PCIe Card
Non-Recoverable Read Errors per Bits Read1 in 1016
Operating Humidity8 to 90%
Read SpeedSequential: 6318 MB/s
SMART SupportYes
Storage Temperature-40 to 149 degrees F / -40 to 65 degrees C
WarrantyLimited 5-Year Warranty
Write SpeedSequential: 6775 MB/s


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Most unopened items sold by Melrose Inc. in new condition and returned within 30 days will receive a refund or exchange. The return window for items sold online begins once the order has been invoiced. Invoicing happens when any part of the order is shipped, delivered by a courier service or made ready for pick up.

Software is not returnable and not refundable. All sales are final. This is generally part of all webcarts selling software. It is buyer beware. The reason for this is once an end-user customer sees a License Code then that code is 'spoiled' because they can use it to gain access to the software.  Once a License Code is registered by a customer that product is available to that customer and therefore the code cannot be returned.

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