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Home/All Brands/OWC/OWC 2TB Accelsior 4M2 PCIe M.2 NVMe SSD Adapter Card
OWC 2TB Accelsior 4M2 PCIe M.2 NVMe SSD Adapter Card
OWC 2TB Accelsior 4M2 PCIe M.2 NVMe SSD Adapter Card
OWC 2TB Accelsior 4M2 PCIe M.2 NVMe SSD Adapter Card
OWC 2TB Accelsior 4M2 PCIe M.2 NVMe SSD Adapter Card

OWC 2TB Accelsior 4M2 PCIe M.2 NVMe SSD Adapter Card

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Product Information


Meet The Fastest SSD Available

When OWC launched its first Solid State Drive in 2010, it was engineered to deliver the same attribute formula that Mac and PC users expected from OWC external storage solutions: High performance + high reliability + affordable price = The OWC Difference

Nearly a decade later, OWCs commitment to that winning formula remains steadfast as they push the boundaries of leading-edge SSD development with the Accelsior 4M2. It’s ideal for uncompromised, data intensive, high bandwidth needs like large format video editing, VR/AR/MR environments, high transactional and complex calculation applications, and extreme gaming.

Accelsior 4M2 houses up to four Aura P12 M.2 NVMe SSDs under a finned heat sink cover that provides silent, throttle-free cooling. These “blade” style SSDs utilise Triple-Level Cell (TLC) 3D NAND with SLC caching and a Phison E12 controller with 7% over-provisioning. All those “ingredients” combine to deliver over 6,000MB/s real-world speed with the highest reliability possible to satisfy the biggest storage performance appetite.

Highly Versatile with Mobile Possibilities

Whether you have the Mac Pro 2019, a Mac Pro 2012 or 2010 or a PC tower, Accelsior 4M2 can go to work for you. As a half-length x8/x16 compatible card, this game-changer offers the versatility you need, so you’re not tied to one PCIe slot size or limited by a space-confined computer case. You can also enjoy the performance boosting benefits of Accelsior 4M2 with your Thunderbolt 3-equipped notebook computer, iMac workstation, or slot filled gaming rig. It’s Plug and Play easy with a PCIe expansion chassis like the OWC Mercury Helios 3S (sold separately).

Change Your Reality

Accelsior 4M2 offers performance gains in so many diverse ways that it will change the reality of how you use a storage solution:

  • Stream and edit high-res video and graphics files without a glitch.
  • 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 visualisations look life-like.
  • Change game levels seamlessly and play flight/driving/MMO games with continuously changing scenery and heavily personal preference modded games without micro-stuttering.
  • Give your computer a significant speed boost with improved system “snappiness”, a fast OS boot drive, or a bottleneck-free scratch drive.

Includes SoftRAID: Easy and Complete Drive Management

Accelsior 4M2 includes SoftRAID software to help you manage your data like a pro. You can maximise drive space, get the fastest access speeds, and protect against drive failure with plug-and-play simplicity. SoftRAID’s easy setup makes it a breeze to create RAID volumes by helping you through the entire process. Just decide what you’re using your RAID volume for and how much space to allocate to it. It's that simple to create your preference of speed and/or redundancy attributes of your data volume. 

Professional Grade = Ready to Work

We understand having confidence in gear reliability is paramount to creative professionals. That’s why every Accelsior 4M2 pre-configured solution undergoes a multi-step performance certification prior to shipping. This ensures your Accelsior 4M2 arrives operating properly and immediately ready for demanding use.

  • Supercharges Mac and PC: ideal for Mac Pro 2019, Mac Pro 2012 or 2010, and PC towers
  • Work faster: over 6,000MB/s real-world speed in RAID 0
  • Store more: add capacity for critical footage, images, files, and games
  • Includes SoftRAID: robust software for creating, monitoring, and managing advanced RAID sets
  • Silent cooling: finned heat sink cover for fanless operation
  • Highly versatile: installs into a full-height, half-length x8 or x16 PCIe 3.0 or 2.0 slot
  • Plug and Play : no drivers needed


OWC Accelsior 4M2 PCIe M.2 NVMe SSD Adapter Card

Adding 4TB SSD Using a PCIe Slot on 2019 Mac Pro


macOS Compatibility
macOS 10.13 High Sierra and above
Windows Compatibility
Windows 10 32-bit Edition, Windows 10 64-bit Edition & Windows Server 2016
RAID Management
Software RAID (SoftRAID)
Card Type
Full Height, Half Length PCIe
PCIe Type
PCIe 3.0
PCIe Lanes
Controller Chipset
ASMedia ASM2824
NAND Flash Components
Toshiba Synchronous Triple-Level Cell (TLC) 3D NAND Flash
S.M.A.R.T. Attributes
Standard attributes supported
Native Command Queuing (NCQ)
Up to 32 simultaneous commands
Internal Connectivity
(4) NVMe 1.3 M.2 Slots (PCIe 3.0 x4)
Internal Connector Form Factor
M.2 - 2280 "M Key"
  • Sequential Read (Max) Up to 6318 MB/s
  • Sequential Write (Max) Up to 6775 MB/s
  • Sequential Read (Average) 6280 MB/s
  • Sequential Write (Average) 6356 MB/s
Nonrecoverable Read Errors
1 per 1016 bits read
TRIM Support
OS Dependent
Error Correction
Built-in ECC
3115TB total bytes written (TBW), equal to 1220 GB per day for 7 years
H: 12.6cm x W: 2.2cm x L: 18.1cm

What's in the box

  • 1 x 2TB Accelsior 4M2
  • 1 x SoftRAID
  • 1 x Quick start guide

Manufacturer Information

Part Number



  • 5 Year Limited Warranty

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