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ToughArmor MB720MK-B V3

4 Bay M.2 NVMe SSD PCIe 4.0 Mobile Rack Enclosure for External 5.25" Drive Bay (4 x OCuLink SFF-8612 4i)
New Released
Product Details
  • Note: To utilize an M.2, U.2, or U.3 NVMe SSD in a PCIe 16x or 8x slot, the motherboard or add-on card must support PCIe Bifurcation. This mode divides PCIe lanes into specific configurations like x4, x4, x4, x4 for a 16x slot or x4, x4 for an 8x slot, ensuring the SSD can be read by the system. For compatible hardware, please refer to the FAQ section. If your hardware is not listed there, please contact us for assistance.
  • Product Introduction
    Introducing the ToughArmor MB720MK-B V3, a rugged and removable quad M.2 PCIe 4.0 NVMe SSD enclosure designed for a 5.25" optical drive bay. This powerful enclosure supports blazing-fast data transfer rates of up to 64Gbp/s through the OCulink (SFF-8612) interface and is compatible with Tri-mode host cards. Installing or removing M.2 NVMe SSDs has never been simpler, thanks to the removable drive trays with tool-less adjustable M.2 drive lockers. You can easily swap drives without having to open your computer case or mess with mounting screws.

    To ensure top-notch cooling performance, the MB720MK-B V3 comes equipped with dual cooling fans in the back, effectively dissipating the heat generated by high-speed PCIe 4.0 SSDs. Moreover, each drive tray features an extra-large heatsink lid and thermal pad, keeping your SSDs at optimal temperatures. As part of ICY DOCK's toughest line, the MB720MK-B V3 boasts a full metal construction and metal barrel key locks, providing maximum protection for your valuable drives.
  • Now Compatible with Tri-Mode Controllers
    By popular demand and in response to recent updates to circuit boards from host card manufacturers, the ToughArmor MB720MK-B V3 now supports Tri-Mode controller cards from leading brands like Broadcom, Areca, and more. For more information on compatible cards and cables, check out the FAQ section on this product page.
  • Superior PCIe 4.0 Performance
    Unlock the full power of PCIe 4.0 NVMe SSDs with the ToughArmor MB720MK-B V3. Each drive bay features a dedicated OCuLink (SFF-8612) connector, enabling a whopping 64Gb/s bandwidth rate—twice as fast as PCIe 3.0 and ten times faster than SATA standards. This makes it a perfect solution for data-intensive applications like autonomous driving, mobile automation, real-time forecasting, film editing, and military computing.
  • Removable Drive Tray Design
    Typically, M.2 SSDs are installed on the motherboard or adapter card and secured with tiny screws, requiring you to open the computer case to access the drives. The ToughArmor MB720MK-B V3 brings your M.2 NVMe SSDs to the 5.25" optical bay of your computer system, allowing you to swap drives without opening the case, making drive maintenance more efficient and hassle-free.
  • Patent-Pending M.2 Drive Locker
    To install a drive, simply place the M.2 PCIe NVMe SSD in the drive tray, adjust the M.2 drive locker to the correct drive length, and you're good to go—no tools or screws needed!
  • Full Drive Length Support
    The M.2 adjustable locker accommodates all standard M.2 PCIe NVMe SSD drives, including 2230 (30mm), 2242 (42mm), 2260 (60mm), 2280 (80mm), and 22110 (110mm), making it universally compatible and future-proof for extra-long M.2 110mm drives.
  • EMI Grounding Technology
    Grounding your M.2 SSD is crucial, as swapping drives without proper grounding can lead to hardware damage from static shocks. Our innovative EMI Grounding Technology ensures that once the drive clips into the M.2 adjustable locker, it remains grounded through the tray, housing, and computer system, protecting your drives from static electrical surges during swapping.
  • ToughArmor Protection
    Built to withstand harsh environments, the ToughArmor MB720MK-B V3 features rugged, heavy-duty full-metal protection throughout the entire device and tray. This makes it ideal for industrial devices requiring a flammability rating and suits various enterprise systems such as military and law enforcement industries, in-vehicle computers, and manufacturing settings like embedded control and factory automation systems.
  • Maximizing Cooling Performance
    Since M.2 NVMe SSDs are known for generating high temperatures, it's essential to maintain operating temperatures at all times to prevent performance degradation. Each drive tray comes equipped with an extra-large, high-efficiency aluminum heatsink lid and thermal pad.
  • The dual 40mm cooling fans work together with strategically placed ventilation holes throughout the entire enclosure to disperse heat effectively.
  • Users can manually select from three fan speed settings—High, Low, and Off—to keep drives at optimal operating temperatures.
  • Packed with Features
    An LED status light built into the tray indicates when your drive is powered up and in use, and it turns off when no drive is installed to save power.
  • For added security, the included key-lock can be used to protect against unwanted access and secure drives in rough environments, like military systems and in-vehicle PCs.
  • With individual drive ID labels, you'll always know which drive tray belongs in your RAID array or contains specific files. Feel free to rearrange or remove them to suit your configurations or for a cleaner look.
  • Exceptional Product Compatibility
    The MB720MK-B V3 is compatible with motherboards, RAID/HBA cards, and M.2 adapters from major brands including Adaptec, Areca, Broadcom, HighPoint, Supermicro, and more. This compatibility gives you the freedom to choose from a wide range of hardware options, moving beyond the constraints of single-brand system configurations. For more information on product compatibility, click here.
  • The ToughArmor MB720MK-B V3 is designed to work seamlessly with SATA 15-pin power cables and OCuLink cables equipped with a locking latch. This ensures cables remain firmly attached, minimizing the risk of unintentional disconnections during vibrations or movement. Once secured, these cables maintain a steadfast connection.
  • Explore our range of compatible cables to simplify your setup process, eliminating the need for extensive research and ensuring a more straightforward experience.

    Compatible Drive Cables:

    • MB206L-B Cable
    • MB302L-B Cable
Which ToughArmor MB720 is right for you?
Model MB720M2K-B MB720MK-B V2 MB720MK-B V3
Cooling Fans Dual Fans
(40 x 40 x 10mm)
Dual Fans (40 x 40 x 20mm)
Fan Speed 4,800 RPM 8,000 RPM
Connectors 4 x MiniSAS HD 4i
4 x OCuLink 4i (SFF-8612)
Pin-out Defined Legacy SFF-9402 Rev 1.1 SFF-9402 Rev 1.1
(Tri-mode HBA/RAID adapters compatible)
Product Dimension
(L x W x H)
171 x 146 x 41.3mm 181 x 146 x 41.3mm
Net Weight 1334g 1325g
Gross Weight 1560.3g 1504.8g
Suitable for NVMe HBA/RAID adapters
with Legacy pin-out
NVMe HBA/RAID adapters
with SFF-9402 pin-out
Tri-mode HBA/RAID adapters
with SFF-9402 pin-out
Customizable ICY DOCK Drive Enclosures: Tailored to Meet TAA & UL Certification Standards and More!
At ICY DOCK, we understand the paramount importance of adhering to various industry and safety standards. While our standard products are already crafted with the highest quality in mind, we also provide our customers with the option to customize ICY DOCK drive enclosures and mobile racks to meet their specific certification requirements. This includes standards such as TAA and UL to wide temperature tests.

Our dedicated team is fully prepared to adjust product materials and designs to ensure complete compliance. Furthermore, we offer comprehensive guidance to our clients throughout the certification process. Our goal is to not only meet precise specifications but also ensure that our products successfully pass stringent tests. Below, you'll find a detailed table listing all the optional certifications that can be tested with our customizable solutions.
Optional Certifications Available for ToughArmor MB720MK-B V3
TAA Trade Agreements Act Compliance
UL Safety Standard Certification
UL94 Flammability of Plastic Materials
FCC Federal Communications Commission Compliance
Wide Temperature MIL-STD-810H - Method 501.7 & 502.7
Customizing ICY DOCK products for specific certifications involves fees for the creation of the certificates, including necessary testing. Please note that some certificates may require recurring fees to remain valid. For more details and inquiries,please contact us at tech@icydock.com
Main Features
Fits 4x M.2 NVMe SSDs of all lengths, 30mm (2230), 42mm (2242), 60mm (2260), 80mm (2280), and 110mm (22110)
Installs into any standard external 5.25" optical drive bay
Supports Tri-mode controllers PCIe/NVMe pinout (Broadcom, Areca, and more)
Connects with 4x OCulink (SFF-8612) (NVMe host required)
Supports PCIe 4.0 specification with transfer rates up to 64Gb/s per drive bay
Patent-pending screw-less M.2 adjustable locker securely holds all length drives
Removable and tool-less drive installation design for easy drive maintenance
Rugged, full-metal enclosure meets flammability requirements
Integrated large, high-efficiency heatsink and ample ventilation for excellent cooling performance
2-segment key lock for additional physical security
Eagle-hook tray latch securely holds the drive tray inside the enclosure
Supports SATA 15-pin and OCuLink cables with locking latch design for a secure connection
EMI Grounding protects SSDs from electrical damage
Industry-leading 5 years limited warranty against all defects
Complimentary support from professionally trained technical support agents

Model Number: MB720MK-B V3
Color: Black
Support Drive Size: M.2 SSD (2230~22110)
Compatible Drive Type: NVMe PCIe Gen 4x4
Number of Drives: 4
Support Drive Length: 30mm – 110mm
Drive Bay: 1 x 5.25" half height bay
Host Interface: 4 x OCuLink SFF-8612 4i, pin-out defined by SFF-9402 Rev 1.1
(Tri-mode HBA/RAID card compatible)
Power Input : 2 x 15pin SATA power connector
Transfer Rate: Up to 64Gbps (depending on SSD specification)
Support SSD Capacity No limitation
Drive Cooling (Active) 2 x 40*40*20mm fan
Structure / Material: Full metal
Drive Security: 2 segment key lock
Dimension (W x H x D): 146 x 41.3 x 179mm
Product Net Weight: 1352g
Package Gross Weight 1578g
Drive Activity LED Indication: Drive power: solid green; Drive access: flashing green
Package Content: Device, user manual, drive ID plugs, screws ,keys
M.2 Connector Insertion Rate 5,000
Humidity: 5%~65% RH
Operating Temperature: 0°C to 60°C (32°F to 140°F)
Storage Temperature: -35°C to 70°C (-31°F to 158°F)
Compliance: CE, RoHS, REACH
Warranty: 5 years limited warranty

Compatible Drive Tray (Caddy):

  • MB720TK-B tray

Compatible Drive cable:

  • MB206L-B Cable
  • MB302L-B Cable

Related Products Series:

  • NVMe Enclosures
  • SAS/SATA Enclosures

ToughArmor Lineup:


Q: Can you recommend an add-on card that is compatible with MB720MK-B V3?

A: To ensure compatibility with MB720MK-B V3, please make sure that your add-on card or motherboard’s BIOS/UEFI supports PCIe Bifurcation when using a PCIe 16x or 8x slot. Additionally, set up the PCIe splitter in the BIOS/UEFI with the configuration of x4, x4, x4, x4 for a PCIe 16x slot or x4, x4 for a PCIe 8x slot.

Please click the icon below to view the compatibility of your motherboards or add-on cards that support PCIe Bifurcation mode. For the best compatibility, we highly recommend using the cables recommended or manufactured by the motherboard or add-on card manufacturer.


We are currently in the process of certifying our NVMe enclosure with major add-on card and motherboard manufacturers. We will keep updating the list to include compatible accessories.

To report a compatible add-on card, cable, or motherboard, or to check the compatibility of add-on card(s) or motherboards that are not listed, please click here.

Q: I've completed the installation of the hard drive and device as per the instructions in the product manual, but the system still can't detect the drive. How can I troubleshoot this issue?

A: Please first confirm the compatibility of your hardware, and make sure that the drive, drive enclosure, cable, and host interfaces are compatible. Try connecting the drive directly to the host to see if the system can detect the drive. If it still doesn't detect it, this can rule out issues with the drive enclosure. You can also try connecting the drive enclosure with different drives, cables, or systems to see if the issue can be resolved. If the system still can't detect it, here are some possible issues:

Insufficient PCIe lanes in the system: Whether you're connecting the drive enclosure to the motherboard or add-on card, It is important to note that the number of available PCIe lanes is limited. This includes understanding the number of lanes provided by the CPU and chipset, as well as their allocation method. Failure to do so may result slower transfer speeds, unstable connections, or even the inability to detect the drive.
Incompatible interface protocols: It is crucial to verify whether the Mini-SAS HD, OCuLink, or SlimSAS interface on the motherboard or add-on card is capable of supporting NVMe.
Incompatible interface pinout standard: Prior to connecting the drive enclosure to the Mini-SAS HD, OCuLink, or SlimSAS port on the motherboard or add-on card, please verify that the port utilizes the same pinout standard as the port on our drive enclosure. To check the pinout standard of our drive enclosure, you can refer to the specification table on our product page, where it specifies whether the pinout standard is Legacy or SFF-9402 1.1.
Excessive length of the connecting cable: To ensure optimal performance, it is advised to use a connecting cable that is no longer than 50cm. Using longer cables can lead to excessive signal loss, resulting in slower transfer speeds, unstable connections, or even the inability to detect the drive. Additionally, we recommend using the same interface connector for both the device and the host to prevent any potential compatibility issues.

Q: The system does not detect the M.2 SSD I installed in the ICY DOCK enclosure. What should I do?

A: Since the M.2 SSD is not designed for hot-swapping, we highly recommend powering off the device/system before inserting or removing an M.2 SSD. If the system is still unable to detect the drive, follow the steps below to scan for new hardware manually:


Windows 11 / Windows 10 / Windows 8 – In the search box on the taskbar, type device manager, and click it from the menu. Once the device manager window pops up, right-click on the disk drive icon, and click scan for hardware changes.


Windows 7 – Right-click on the computer icon on the desktop, select properties, click device manager, right-click on the disk drive icon and then click scan for hardware changes.

Image result for disk drive scan for hardware changes


Q: The mounting screws for the device seem to be too short to secure the device onto my system, what should I do?

A: For computer cases that have a thick metal sheet, the included mounting screws (M3*2.5L) may not fully secure the device. Please use longer screws (M3*4L) to secure the device or contact us at tech@icydock.com for replacement screws.

Q: Can I replace the cooling fan attached to the device? Will doing that void the warranty?

A: The cooling fan we used has been thoroughly tested with the drive enclosure to ensure it functions properly and supports the fan speed control (for select models). Therefore, we suggest our customers keep the original fan for the best result. However, we understand the stock fan may not be suitable for all the applications, so we elected to honor the warranty when 3rd party fan is using. The warranty may void if the 3rd party fan causes electrical damage to the device, though.

Q:  Which specification should I check before buying the 3rd party cooling fan?

A:The following information is the fan specification requirement and compatible fan models for MB720MK-B V3


Fan Dimension (LxWxH) 40 x 40 x 10mm 40 x 40 x 20mm 
Connector Type 3 Pin Wafer
Rated Voltage (VDC) 12V DC
Rated Current (A) < 0.12A (127mA)
Screw Specification Phillips Flat Head - M3 x 15mm - Steel
(Not Included)
Phillips Flat Head - M3 x 25mm – Steel
(Came with stock fan)


Compatible fan models
(without test, use it at your own risk)



Q: I'm having the difficulties closing the lid of the drive tray and unable to insert the drive tray all the way to the drive enclosure after placing the M.2 SSD onto the drive tray.

A: Make sure to lock the M.2 SSD with the adjustable M.2 locker. The tray lid will not close properly if the M.2 locker is not fully secured. If you are having difficulty secure the M.2 locker or close the cover, the M.2 SSD you are using may not follow the standard M.2 SSD thickness, which is less than 1.5mm height for each side with a total height that does not exceed 3.8mm. Using the M.2 SSD with non-standard thickness will cause improper tension on the M.2 locker and tray lid and make the M.2 connector misaligned. If you are having issues inserting the drive tray to the enclosure, please stop the operation immediately and check the drive thickness to ensure it follows the standard M.2 SSD thickness - less than 1.5mm height for each side and less than 3.8mm for total height.


Note: Some M.2 SSD uses a metal heat dissipation sticker that causes each side's thickness more than the 1.5mm. Remove the sticker will solve the problem, but do it at your own risk (might void the warranty of SSD)


ICY DOCK enclosure is design to be compatible with M.2 SSD that has standard thickness. We highly recommend checking the drive thickness before purchase, and please refer to the incompatible M.2 SSD list below for further information:


M.2 NVMe SSDs known to be incompatible with ICY DOCK enclosure:


Please contact tech@icydock.com if the problem persists so we can resolve the issue as soon as possible.

Click here to report a compatible/incompatible M.2 SSD.

Q: I feel that the drive tray's upper and lower metal spring is stuck when inserting the drive tray. What should I do?

A: Remove the drive tray from the enclosure and reinsert the tray without putting excessive pressure on the metal mesh sheet in front of the tray. Excessive force on the front metal mesh sheet may bend the top and bottom metal spring, causing difficulties when inserting the drive tray. Therefore, please do not forcingly insert the drive tray when this happens as it may cause damage to the metal spring.


metal spring
Please DO NOT put excessive pressure on the metal mesh sheet as shown

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