OWC Accelsior 4M2

OWC Accelsior 4M2 OWC Accelsior 4M2 Front OWC Accelsior 4M2 Back OWC Accelsior 4M2 Hero OWC Accelsior 4M2 SSD

OWC Accelsior 4M2

Over 6000MB/s

Blistering fast speeds

Up to 16TB

Room for large format files

Quick Specs:

  • Includes SoftRAID
  • Plug and play
  • PCIe 3.0 x8
  • (4) M.2 NVMe SSDs
  • Mac & PC

High-Performance PCIe M.2 NVMe SSD Solution

  • Work Faster: over 6,000MB/s real world speed in RAID 01
  • Supercharges Mac and PC: ideal for Mac Pro 2019, Mac Pro 2012 or 2010, and PC towers
  • Highly Versatile: installs into a full-height, half-length x8 or x16 PCIe 3.0 or 2.0 slot2
  • Slot-Powered: no extra power cables needed

  • 30-day 100% Money-Back Guarantee!
  • Easy DIY install videos
  • Free shipping on all OWC SSDs
  • You have questions? We have answers!

PCIe Expansion Card Only

With SoftRAID XT — Add your own M.2 SSDs.

The Fastest SSD We’ve Ever Built

Accelsior 4M2 NVMe SSD is OWC’s fastest SSD ever with over 6,000MB/s speed for large format video editing, VR/AR/MR environments, extreme gaming, and other high bandwidth needs. Available in capacities up to 16TB, Accelsior 4M2 is the ultimate performance drive for Mac Pro 2019, Mac Pro 2012 and 2010, and PC towers.

It offers silent cooling via a finned heat sink cover and installation versatility with a half-length x8/x16 design. If a Mac/PC doesn’t have an open or compatible PCIe slot but is Thunderbolt 3-equipped, Accelsior 4M2 can be used externally in the OWC Mercury Helios 3S.3

over 6,000MB/s real world speed in RAID 01

ideal for Mac Pro 2019, Mac Pro 2012 or 2010, and PC towers

installs into a full-height, half-length x8 or x16 PCIe 3.0 or 2.0 slot2

no extra power cables needed

finned heat sink cover for fanless operation

pre-configured solutions undergo performance verification

start working in seconds4

up to 5 Year OWC Limited Warranty5

The Performance Advantage of NVMe

Non-Volatile Memory Express (NVMe) is a communication standard specifically built to optimize the performance of modern flash technology. It enables significantly faster SSD performance vs an SSD using the SATA interface, a communication protocol that was originally designed for hard disk drives. With NVMe SSDs powering its heartbeat, Accelsior 4M2 offers the fastest data rates ever delivered by an OWC SSD.

More Lanes = Faster Throughput

Accelsior 4M2 was designed with a PCIe switch to let your computer address each of the M.2 NVMe drives at full x4 PCIe speeds instead of hard-limiting each drive to x2 PCIe speeds. When running in JBOD, where all four drives are typically not accessed at the same time, each drive has the unlocked capability to run at full speed.

2 to the Second Power

When over 6,000MB/s real world speed and 16TB of capacity isn’t enough to satisfy your needs, you can RAID two Accelsior 4M2 cards together to experience out-of-this-world performance.

Includes SoftRAID: Easy and Complete Drive Management

Accelsior 4M2 includes SoftRAID software to help you manage your data like a pro. Use it to maximize 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.

  • Up to 86% faster vs AppleRAID
  • Create advanced RAID 0, 1, 4, 5, 1+0 (10) volumes for higher performance, greater data reliability, and/or redundancy
  • Enterprise-class monitoring for disk and RAID volume health with email notifications
  • Volume validation to ensure sectors can be read, parity is correct, and minimization of volume failure
  • Disk certification checks that your disks are safe to store data on before use
  • Disk failure prediction with early warning helps protect you from sudden disk failure

OWC Aura P12 Pro

The perfect match for Accelsior 4M2.

Combine Accelsior 4M2 with its perfect performance match – fast OWC Aura P12 Pro NVMe M.2 SSDs. Build your own ultra-fast RAID ready PCIe internal storage solution, and enjoy incredible transfer speeds, capacity, and OWC reliability!

Shop Aura P12 Pro NVMe M.2 SSDs »

OWC, Trusted by Pros & Enthusiasts the World Over

OWC, Trusted by Pros & Enthusiasts the World Over

We build our hardware to the highest standards of reliability and performance. Because 100% reliability is always the goal, we rigorously quality test and back our hardware with a 5 Year OWC Limited Warranty and award-winning customer support.

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  1. Data transfer rates will vary based on SSDs used, CPU speed, RAID setting, and PCIe version.
  2. Backward compatible with PCIe 2.0 slots at reduced speeds.
  3. Performance in a Thunderbolt 3 PCIe expansion chassis limited by maximum Thunderbolt 3 PCIe bandwidth of 2,800MB/s.
  4. Bootable using a single, independent M.2 startup disk, with the other three M.2 SSDs configured as independent volumes or as a software RAID (SoftRAID or Apple RAID). macOS 10.14.6 required on Mac Pro (2010-2012). macOS 10.15.1 or later required on Mac Pro (2019).
  5. 5 Year OWC Limited Warranty for 1.0TB and higher capacity PCIe SSD solutions. 3 Year OWC Limited Warranty for PCIe Expansion Card only.