1-800-275-4576
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
Mfr P/N: SSDACL4M20GB OWC SKU: OWCSSDACL4M20GB
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
- 3 Year OWC Limited Warranty
Build The Fastest SSD Available
Highly Versatile with Mobile Possibilities
Change Your 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.
- 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
Professional Grade = Ready to Work
- 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.
Includes
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- (1) OWC Accelsior 4M2 PCIe Adapter Card
- (1) Quick Start Guide for OWC Accelsior 4M2
- (1) Assembly Manual & User Guide for OWC Accelsior 4M2
- (1) 3 Years of SoftRAID Premium Access (License located on device)
- (1) Quick Start Guide for OWC SoftRAID (Digital)
- 3 Year OWC Limited Warranty
Specs
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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
- NVMe SSDs with a heatsink will not fit and are not supported.
- 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.
- When installed, the following SSDs will only be compatible with Windows 10 systems: Hynix Gold P31, Samsung PM981a.
- 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).
Compatibility & Installation Videos
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Mac Pro
Videos
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M.2 Drive Install Install Video
Customer Reviews
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Great drive, super! Arrived on time.
I would recommend this product to a friend!
Verified Purchase.- Reviewer:Reviewer2512973905
Thank you so much for your awesome review! We're thrilled to hear you're enjoying your new drive and that it arrived on time. Your satisfaction means the world to us!
This was a great way to add an 8TB SSD scratch disk to my MAC Pro. Highly recommend this as an option.
I would recommend this product to a friend!
Verified Purchase.- Reviewer:mllacey
Thank you for your fantastic review! We're thrilled to hear that our 8TB SSD scratch disk is enhancing your Mac Pro 2019 experience. Your recommendation means the world to us, and we’re excited that you found the perfect solution for your needs. Happy computing! Please feel free to contact us if you have any further questions, comments, or concerns. https://eshop.macsales.com/Service/
I purchased what I thought would be a brand new 4 TB Accelsior 4M2 PCIe SSD and receive a used one with Files already loaded on the SSD and the older Aurora version Ultra 3 memory. Very disappointing. I will not be shopping at OWC again. Customer services response was it should be the same as the new Ultra 3 memory. When you buy a new product, you expect a new product. Especially when it cost $200 more than the same product you purchased a year ago. The Accelsior 4M2 PCIe SSD had already been formatted and had files already loaded onto it that were NOT the SoftRAID program. I do know the difference between a new and used SSD.
Verified Purchase.- Reviewer:Reviewer798287875
We’re truly sorry to hear about your recent experience and understand your disappointment with receiving a product that didn’t meet your expectations. While we aim to be as transparent as possible on our website, we do specify in the specifications section that OWC reserves the right to replace or upgrade components to equivalent or better versions to provide optimal performance. Please be assured that all our RAID drives are shipped new and pre-formatted in RAID 0, as outlined on our site. If you still have concerns or would like additional assistance with this drive, our team is here to help. We value your feedback and apologize for the inconvenience this may have caused.
