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OWC

Accelsior 4M2
2.0TB PCIe NVMe M.2 SSD Storage Solution

New Condition | Open Box

High-Performance PCIe NVMe M.2 SSD Solution
Meet The Fastest OWC SSD Ever Built
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 four OWC Aura P12 Pro NVMe M.2 SSDs under a finned heat sink cover that provides silent, throttle-free cooling. These “blade” style SSDs utilize 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 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.
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.
  • Ensure augmented reality visualizations 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 XT: Easy and Complete Drive Management
SoftRAID XT is the most powerful, intuitive software RAID utility on the market. Multiple RAID levels let you select the RAID level that fits you or your project’s needs best. If you need maximum volume capacity, optimum drive performance, data protection, or a combination of attributes, SoftRAID has you covered.

Packed with features like drive validation, verification and failure prediction—SoftRAID includes features you simply don’t get with hardware RAID. It’s like having a datacenter on your desktop! From home users looking to protect photos and documents to professionals needing to protect and quickly access projects, SoftRAID is the perfect solution.
  • Compatible: Works with macOS 11 Big Sur, M1 Macs and Windows 10
  • Advanced: Create RAID 0/1/4/5/1+0 (10) with Macs, RAID 0/1 with Windows machines
  • Protected: SoftRAID Monitor constantly watches your disks and alerts you if problems are detected
  • Validated: Volume validation ensures sectors can be read and parity is correct
  • Certified: Checks disks before use to ensure they are safe for data storage
  • Vigilant: Error prediction helps protect against unexpected failure
  • Universal: Move SoftRAID arrays seamlessly between Macs and PCs with built-in OWC MacDrive technology
SoftRAID provides a level of performance that you simply can’t get with hardware RAID. Learn more about the power of SoftRAID XT.
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.
Your Digital Life…Protected for FREE
Your data is irreplaceable, and we take protecting it seriously. That’s why this OWC Solution includes Acronis True Image OEM — the world’s only combination backup and antimalware solution that keeps your data protected from accidents, failures, and malware/ransomware attacks.
  • Easy: Protect everything – photos, files, applications, systems, and the devices they’re on in just a few clicks
  • Efficient: create “set and forget” backups to recover and restore files and folders
  • Secure: Stop ransomware and cryptojacking attacks from harming your device data and backup
Learn more about Acronis True Image OEM
SoftRAID XT works with macOS 10.12 or later and Windows 10. Intel-based Macs require macOS 10.12 or later. M1 Macs require macOS 11.1 or 11.3 and later. macOS 11.3 is currently available as a public beta. 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 4/5/1+0 (10) are currently Mac only at this time.

Product Specifications

Specifications
  • Total Capacity
    • 2.0TB
  • Standard Mechanism
    • (4) 480GB OWC Aura P12 Pro NVMe M.2 SSDs
    • (1) OWC Accelsior 4M2 PCIe Card
    • *OWC reserves the right to replace or upgrade to equivalent or better components.
  • Chipset
    • ASMedia ASM2824
  • Capacity
    • 1872GB Useable Capacity
    • Total Flash Memory Components: 2000GB
    • 128GB Allocated to real-time data redundancy and error correction
  • Formatted Capacity
    • 1743 GiB
  • Form Factor
    • M.2 - 2280 "M Key"
  • Interface
    • PCIe 3.0 X4, NVMe 1.3
  • Controller
    • Phison E12 with 7% over-provisioning
  • 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
  • RAID Support
    • Yes
  • RoHS Compliant
    • Yes
  • Certifications
    • CE
    • FCC
RAID
  • RAID Features
    • SoftRAID Compatible
  • RAID Levels Supported
    • Software RAID (SoftRAID)
Performance
  • 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
Reliability
  • Nonrecoverable Read Errors
    • 1 per 1016 bits read
  • TRIM Support
    • OS Dependent
  • Error Correction
    • Built-in ECC
  • Endurance
    • 800TB total bytes written (TBW), equal to 314 GB per day for 7 years
Compatibility
  • Mac OS Compatibility
    • macOS 10.13 High Sierra
    • macOS 10.14 Mojave
    • macOS 10.15 Catalina
    • macOS 11.x Big Sur
  • PC OS Compatibility
    • Windows 10 64-bit Edition
    • Windows Server 2016
  • Other OS Compatibility
    • Linux kernel versions 5.4 or later
  • Other Requirements
    • SoftRAID XT works with macOS 10.12 or later and Windows 10. Intel-based Macs require macOS 10.12 or later. M1 Macs require macOS 11.1 or 11.3 and later. macOS 11.3 is currently available as a public beta. Requires macOS 10.13.6 or later.
Physical
  • 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)
  • Internal Connectivity
    • (4) NVMe M.2 Slots (PCIe 3.0 x4)
  • External Connectivity
    • none
  • Activity LED
    • Yes
Environmental
  • 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
Acoustics
  • Idle (Typical)
    • 0.0 bels
  • Seek (Typical)
    • 0.0 bels

Notes

  • Please review Accelsior 4M2: Mac Pro Install Notes prior to installation.
  • Before installing this product in a host device, write down the SoftRAID serial number that is listed on the back of the PCIe card. It is needed to setup the SoftRAID application.
  • Data transfer rates will vary based on SSDs used, CPU speed, RAID setting, and PCIe version.
  • Backward compatible with PCIe 2.0 slots with reduced speeds.
  • Performance in a Thunderbolt 3 PCIe expansion chassis limited by maximum Thunderbolt 3 PCIe bandwidth of 2800MB/s.
  • 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.
Manufacturer provided specifications for OWC p/n OWCSSDACL4M22TO
Note: Please review Accelsior 4M2: Mac Pro Install Notes prior to installation.
This product is compatible with... Learn how to find your Mac's model ID
Mac Pro
Mac Pro Rack (Early 2020)
(January 2020)
Model ID: MacPro7,1
2.5GHz 28-Core
Install videos coming soon
Mac Pro
Mac Pro Rack (Early 2020)
(January 2020)
Model ID: MacPro7,1
2.7GHz 24-Core
Install videos coming soon
Mac Pro
Mac Pro Rack (Early 2020)
(January 2020)
Model ID: MacPro7,1
3.2GHz 16-Core
Install videos coming soon
Mac Pro
Mac Pro Rack (Early 2020)
(January 2020)
Model ID: MacPro7,1
3.3GHz 12-Core
Install videos coming soon
Mac Pro
Mac Pro Rack (Early 2020)
(January 2020)
Model ID: MacPro7,1
3.5GHz 8-Core
Install videos coming soon
Mac Pro
Mac Pro (Late 2019)
(December 2019)
Model ID: MacPro7,1
2.5GHz 28-Core
Mac Pro
Mac Pro (Late 2019)
(December 2019)
Model ID: MacPro7,1
2.7GHz 24-Core
Mac Pro
Mac Pro (Late 2019)
(December 2019)
Model ID: MacPro7,1
3.2GHz 16-Core
Mac Pro
Mac Pro (Late 2019)
(December 2019)
Model ID: MacPro7,1
3.3GHz 12-Core
Mac Pro
Mac Pro (Late 2019)
(December 2019)
Model ID: MacPro7,1
3.5GHz 8-Core
Mac Pro
Mac Pro 4-Core (Mid 2010)
(July, 2010)
Model ID: MacPro5,1
2.8GHz, 3.2GHz
Mac Pro
Mac Pro 6-Core (Mid 2010)
(July, 2010)
Model ID: MacPro5,1
3.33GHz
Mac Pro
Mac Pro 8-Core (Mid 2010)
(July, 2010)
Model ID: MacPro5,1
2.4GHz
Mac Pro
Mac Pro 12-Core (Mid 2010)
(July, 2010)
Model ID: MacPro5,1
2.66GHz, 2.93GHz
Mac Pro
Mac Pro 4-Core (Mid 2012)
(June, 2012)
Model ID: MacPro5,1
3.2GHz
Mac Pro
Mac Pro 6-Core (Mid 2012)
(June, 2012)
Model ID: MacPro5,1
3.33GHz
Mac Pro
Mac Pro 12-Core (Mid 2012)
(June, 2012)
Model ID: MacPro5,1
2.4GHz, 2.66GHz, 3.06GHz
OWC Helios
OWC Mercury Helios 3S
Thunderbolt 3 PCIe
expansion chassis
3.5-inch Enclosures
AKiTiO Node Duo
Thunderbolt 3 PCIe Expansion Chassis
Model # AKT3N2AA0002Y
3.5-inch Enclosures
Akitio Node Lite

Gallery

Customer Ratings

Write a Review 4.4 / 5 5 out of 7 (71%) reviewers would recommend this product
Verified Buyer
Reviewer: limnerian
Rating: 5/5 Best place for Mac hardware! May 20, 2021 Great products, especially for newer mac models. High end components and manufacturing. And packed to withstand crappy delivery companies.

I would recommend this item to a friend! This review is from 4.0TB OWC Accelsior 4M2 PCIe 3.0 NVMe M.2 SSD Storage Solution.

Verified Buyer
Reviewer: DJKoren2
Rating: 5/5 Working great! Using in Mac Pro 2019 May 17, 2021 So far working awesome! Took a while to figure out the RAID stuff. I got the 2TB option plan on upgrading it in the future. Can’t complain.

I would recommend this item to a friend! This review is from 2.0TB OWC Accelsior 4M2 PCIe 3.0 NVMe M.2 SSD Storage Solution.

Verified Buyer
Reviewer: chrishefferen
Rating: 5/5 Excellent addition to my Mac Pro 2019! April 29, 2021 Excellent addition to my Mac Pro 2019! Had a minot glitch with the raid software but contact with customer service was fast, easy and solved the problem in 10 minutes! This company makes great products and actually has fantastic customer service.

I would recommend this item to a friend! This review is from 8.0TB OWC Accelsior 4M2 PCIe 3.0 NVMe M.2 SSD Storage Solution.

Reviewer: JeffS Location: Larchmont, NY Age: 55-65 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 4/5 Accelsior 4M2 1TB Speed on MacPro5,1 September 20, 2020 I like the speed, After the 3rd Iteration disk speed was 2,485.1 MB/s Write, and 2,695.1 MB/s Read using Disk Speed Test v3,2 (c) 2018 Blackmagic Design, Inc. Using Raid 0 (Striped) of 4 M2's , using the included SoftRaid v5.8.4. The software is included.NOTE: I. have a Radeon RX 580 8 GB in slot 1 and have to put spacers on it so that the fans would work on the RX 580 cars. It seems the protruding bolts that hold he 4 M2'a in place hit the fan. There are four internal MVE M.2 SSD cards. Named: Aura P12 240 GB x4 = 1 TB. Upgraded the SoftRaid, so be sure to get the SoftRaidKey from the back side to the board, before you update, as it will be in the demo mode, until get get that key. I will try to remove one disc from the 4 drive Raid 0 and see if I can also use one M2 as a fast boot drive. I will put in another review if that works and what the speed of a 1 M2 boot and a 3 M2 drive Raid 0 does.

I would recommend this item to a friend! This review is from 1.0TB OWC Accelsior 4M2 PCIe 3.0 NVMe M.2 SSD Storage Solution.

Verified Buyer
Reviewer: Luigino Location: Kearny, NJ Age: 55-65 Experience Level: IT Professional Owned Product: 3-4 months
Rating: 5/5 Great External Drive! September 15, 2020 Needed a second external drive to connect to my mac mini and this fit the bill perfectly. Installed it into a Sonnet box and connected using thunderbolt 3. It is blazingly fast and reliable. OWC is the best!

I would recommend this item to a friend! This review is from 2.0TB OWC Accelsior 4M2 PCIe 3.0 NVMe M.2 SSD Storage Solution.

Verified Buyer
Reviewer: terryhasapoint Location: UK Age: Over 65 Experience Level: Power User Owned Product: 3-4 months
Rating: 3/5 I wanted to put 5 stars BUT July 5, 2020 So I had one of these and it's very fast - It has the sort of speed I need to create 4k videos with multiple layers. But one of the internal ssd's suddenly crashed and it took me three days to recompile the library I had placed on it. Yes RAID 0 is dangerous, but a failure like this within a few months of purchase is not good on any level. Had I put this in mirror raid I'd have achieved half or less of the speed I require and half of the storage. But I needed the speed so I bought a second unit as direct back up to the first - so 2.5k expenditure when I'd have wanted to spend 1k. So I think 3 stars is a reasonable score.

This review is from 4.0TB OWC Accelsior 4M2 PCIe 3.0 NVMe M.2 SSD Storage Solution.

Verified Buyer
Reviewer: Worldnate Location: IN Age: 35-44 Experience Level: Home User Owned Product: less than a month
Rating: 4/5 Fast but not what I expected May 20, 2020 I used this drive In a MacPro 2010 5,1 tower. I expected 2500MB/s read and write speeds based off credible YouTube sources with my tower. I have an original 2009 flashed to a 2010 so the board is identical. I spent an hour on chat support and the agent told me my speeds were what I should be getting. I’m going to have to look into other options such as the evo plus drives to see if it will help. I need faster drive speeds for photography tools such as DXO and AI sharpen to name a couple. I wish accurate credible speeds were listed with corespoding Mac models On the drive spec page.

This review is from 2.0TB OWC Accelsior 4M2 PCIe 3.0 NVMe M.2 SSD Storage Solution.

OWC Accelsior 4M2 2.0TB PCIe NVMe M.2 SSD Storage Solution Mfr P/N: SSDACL4M202T OWC SKU: OWCSSDACL4M22TO 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. Powered by SoftRAID. 5 Year OWC Limited Warranty Ships: Same Day
Supply Limited: 5 available
Only $679.99Garage Sale Price $588.75
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Additional Capacities: PCIe Expansion Card Only
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