OWC Accelsior 4M2

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OWC Accelsior 4M2

Four-Slot NVMe M.2 SSD to PCIe 3.0 Adapter Card with SoftRAID for Mac Pro (Late 2019 - Current), Mac Pro (2010 - 2012), PC Towers & Thunderbolt PCIe Expansion Chassis

Used | OWC Tested


Mfr P/N: SSDACL4M20GB OWC SKU: OWCSSDACL4M20GU

High-Performance NVMe M.2 SSD PCIe Adapter Card

  • Supercharges Mac and PC: ideal for Mac Pro (Late 2019 - Current), Mac Pro (2010 - 2012), 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
  • 1 Year OWC Limited Warranty
availability

Additional Capacities

PCIe Adapter Card with SoftRAID

0TB
arrow up 0TB $379.99$219.75 in stockIn Stock: Ships Same Day!

PCIe SSD Solutions with SoftRAID

8TB
arrow up 8TB $1,399.00$799.88 in stockIn Stock: Ships Same Day!

Item Condition Options

New, Retail Box
arrow up New $299.99 in stockIn Stock: Ships Same Day!
New, Open Box
arrow up New, Open Box $379.99$219.75 in stockIn Stock: Ships Same Day!

Build 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, our commitment to that winning formula remains steadfast as we 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 NVMe M.2 SSDs under a finned heat sink cover that provides silent, throttle-free cooling. When tested with OWC Aura Ultra III NVMe M.2 SSDs, Accelsior 4M2 delivers over 6,000MB/s real-world speed with the highest reliability possible.

Highly Versatile with Mobile Possibilities

Whether you have the Mac Pro 2019, a Mac Pro 2012 or 2010, or 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 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.

Change Your Reality

Accelsior 4M2 offers performance gains in so many diverse ways that it will change your storage reality:
  • 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.
  • Enhance the realism of augmented reality visualizations.
  • Change levels seamlessly and play simulation and MMO games with continuously changing scenery or heavy mods 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.

The Most Powerful RAID Tool on the Planet.

SoftRAID is the world’s fastest and most flexible application to configure, maintain, and protect your RAID volumes on Mac and PC. OWC enclosures include 3 Years of SoftRAID Premium.
  • High-Performance RAID 0/1/4/5/1+0 (10) volumes
  • Predictive Health Monitoring proactively notifies of Volume and Disk issues well before failure — provided on your computer and remotely
  • 35+ Years of Experience of Pro Support to provide peace-of-mind with setup help, ongoing questions, or urgent disk issues
  • And many more unique features.
  • Learn more about SoftRAID
SoftRAID works with macOS 10.14+, Windows 10+, and Windows Server 2019/2022. M1 Macs require macOS 11.3 or later. SoftRAID is licensed per computer.

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.
  1. SoftRAID works with macOS 10.14+, Windows 10+, and Windows Server 2019/2022. M1 Macs require macOS 11.3 or later.
  2. SoftRAID is licensed per computer.

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    Drive Bays

    • 4 bays supporting: M.2 drives
    • Supports NVMe M.2 SSDs with 2280 form factor and "M Key" connector type. Single- and double-sided SSDs are supported.
    • NVMe SSDs with a heatsink will not fit and are not supported.

    RAID Support

    • Yes

    Form Factor

    • M.2 - 2280 "M Key"

    Drive Interface

    • PCIe 3.0 x8, NVMe 1.3

    RAID Capable

    • Yes

    RAID Features

    • Software RAID

    RAID Management

    • Includes OWC SoftRAID RAID Management Software

    Internal Connectivity

    • (4) NVMe M.2 Slots (PCIe 3.0 x4)

    Card Interface

    • PCIe

    PCIe Bus Interface

    • PCI Express 3.0 x8

    PCIe Form Factor

    • PCIe x8 full height, half length
    • Compatible with PCIe x8 slots or larger

    PCIe Bandwidth Allocation

    • Advanced Switch: A total of eight lanes of bandwidth are available with any single drive using up to four lanes max.

    Chipset / Controller

    • ASMedia ASM2824

    Mac OS Compatibility

    • macOS 10.13 High Sierra
    • macOS 10.14 Mojave
    • macOS 10.15 Catalina
    • macOS 11.x Big Sur
    • macOS 12.x Monterey
    • macOS 13.x Ventura
    • macOS 14.x Sonoma
    • macOS 15.x Sequoia

    PC OS Compatibility

    • Windows 10 64-bit Edition
    • Windows Server 2016
    • Windows Server 2022
    • Windows 11

    Other OS Compatibility

    • Linux kernel versions 5.4 or later

    Other Requirements

    • SoftRAID works with macOS 10.14 or later and Windows 10 or later. SoftRAID is licensed per computer. The SoftRAID serial number will work with both Mac and Windows but can only be active on one computer at a time. Additional seats can be purchased. RAID 4/1+0 (10) are currently Mac only at this time.

    Power/Activity LED

    • Yes

    Dimensions

    • Height: 12.6 cm (5.0 in)
    • Length: 18.1 cm (7.1 in)
    • Width: 2.2 cm (0.9 in)

    Weight

    • 381.0 g (0.84 lbs)

    Certifications

    • CE
    • FCC

    RoHS Compliant

    • Yes

    Ambient Temperature

    • Operating: 41°F to 95°F (5°C to 35°C)
    • Non-Operating: -4°F to 140°F (-20°C to 60°C)

    Altitude

    • Operating: -304.8 m to 3,048.0 m (-1,000 ft to 10,000 ft)
    • Non-Operating: -304.8 m to 12,192.0 m (-1,000 ft to 40,000 ft)

    Humidity

    • Operating: 8% to 90% non-condensing
    • Non-Operating: 5% to 95% non-condensing

    Idle (Typical)

    • 0.0 bels

    Seek (Typical)

    • 0.0 bels
    1. NVMe SSDs with a heatsink will not fit and are not supported.
    2. Data transfer rates will vary based on SSDs used, CPU speed, RAID setting, and PCIe version.
    3. Backward compatible with PCIe 2.0 slots with reduced speeds.
    4. Performance in a Thunderbolt 3 PCIe expansion chassis limited by maximum Thunderbolt 3 PCIe bandwidth of 2800MB/s.
    5. 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). Mac Pro (2010-2012) requires macOS 10.14.6. Mac Pro (2019) requires macOS 10.15.1 or later.
    6. When installed, the following SSDs will only be compatible with Windows 10 systems: Hynix Gold P31, Samsung PM981a.
    7. The LED function of this product will be disabled and not function if used with an 8TB OWC Aura Ultra IV MVMe M.2 SSD (OWCP4U8T1PT08).