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ToughArmor MB842MP-B

Removable 2 Bay M.2 NVMe SSD to PCIe 4.0 x8 Mobile Rack Enclosure for PCI Express Slot (PCIe Bifurcation required)
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.

  • The ToughArmor MB842MP-B turns a PCIe 8x or 16x expansion slot into a dual removable M.2 NVMe drive bays, allowing you to swap the M.2 NVMe SSDs without needing to open the computer case.
  • Innovative Removable M.2 NVMe SSD Enclosure
    A typical M.2 drive is installed on a motherboard or a riser card and is secured by a small screw. Additionally, the physical installation process is very troublesome and time-consuming. The ToughArmor MB842MP-B’s removable drive tray design utilizes the PCI express slot to make the M.2 SSD installation and removal process completely hassle-free.
  • State of the Art Tool-less M.2 Drive Installation
    The tool-less M.2 NVMe SSD installation design takes less than five seconds to complete, saving you the hassle of dealing with tiny easy-to-lose screws.
  • The patent-pending adjustable M.2 locker secures the M.2 NVMe SSD (2230, 2243, 2260, 2280, 22110) onto the drive tray by sliding the M.2 locker towards the SSD to lock the M.2 SSD in place.
  • Optimal Cooling Efficiency
    The specialized slim M.2 drive tray is made of thick aluminum and acts as a heatsink to dissipate heat generated by the M.2 NVMe SSD.
  • The included thermal pad fills the gap between the contact surface and transfers heat away from M.2 NVMe SSD to the larger aluminum surface, allowing airflow to move the heat away quickly.
  • EMI Grounding Technology
    Grounding your M.2 NVMe SSD is critical, especially during frequent drive swaps due to static shocks. Our adjustable M.2 locker will clip into the SSD screw hole and ground the drive throughout the tray and the enclosure.
  • Maximum Compatibility
    The ToughArmor MB842MP-B is designed for the PCIe slot and is compatible with PCIe 3.0/4.0 x8 and x16 slots.

    Note: PCIe Bifurcation mode (x4, x4, x4, x4 for PCIe 16x slot or x4, x4 for PCIe 8x slot) is required to access both M.2 NVMe SSD.
  • Superior PCIe 4.0 Performance
    The advantage of utilizing the PCIe 3.0/4.0 interface is that it provides power and data through a single PCIe slot, reducing the system’s cable clutter. In addition, the blazing-fast 64Gbps transfer speed is 10x faster than SATA III, making it an ideal solution for data-intensive applications such as machine learning, cloud computing, data mining, or even image processing.
  • Rugged Protection for the Harshest Environments
    The ToughArmor MB842MP-B is equipped with solid plastic, metal housing, and full metal drive trays to ensure a long product life and comes with a 5-year warranty.
  • Packed with Features
    The ToughArmor MB842MP-B is built with drive activity LED indicators on each drive tray to show the drive power and activities. The LED will automatically power off when no drive is detected to save energy.
  • The optional 2-pin HDD activity signal output (cable is not included) allows you to transfer the drive activity signal to the computer case or LED panel and provide an alternative view at the desired location.
  • Wide Range of Compatibility
    The specially designed MB840TP-B removable drive tray effortlessly enables seamless interchangeability across various models.
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 MB842MP-B
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 2x M.2 PCIe NVMe SSD from 30-110mm (2230, 2243, 2260, 2280, 22110)
Uses 1x PCIe 3.0/4.0 x8 or x16 slot (PCIe Bifurcation x4, x4, x4, x4 for PCIe 16x and x4, x4 for PCIe 8x is required to access both drives)
Installs to a single-width full-height PCIe express slot
Removable drive tray with tool-less drive installation for easy drive maintenance
Eagle-hook lock system keeps the drive secured in the enclosure
EMI- Grounding – protects the hard drive from electrical damage
Active-Power Technology (APT) – saves power by shutting the device when no drive is installed
PCIe interface provides power and data transfer to reduce cable clutter
The included thermal pad conducts heat from the drive to the metal drive tray
Optional HDD activity signal output lets you transfer the drive activity signal to the computer case
Industry-leading 5-year limited warranty against all defects
Complimentary support from a professionally trained US-based technical support agent

Model Number: MB842MP-B
Color: Black & silver
Support Drive Size: 2 x M.2 PCIe NVMe SSD (2230/2242/2260/2280/22110)
Compatible Drive Type: M.2 PCIe 3.0/4.0 NVMe SSD
Number of Drives: 2
Support Drive Length: 30mm – 110mm
Drive Bay: 1 x PCIe 3.0 or 4.0 x8 / x16 expansion slot (motherboard required PCIe x8 slots bifurcated into x4/x4 or PCIe x16 slots bifurcated into x4/x4/x4/x4)
Host Interface: PCIe 4.0 x8
Power Input: Via PCIe
Transfer Rate: Up to 64Gbps (depending on drive speed)
Support SSD Capacity: No limitation
Drive Cooling: Metal heat dispersion with passive cooling
Structure / Material: Metal with partial ABS plastic
Product Dimension (L x W x H) : 171 x 120.8 x 21.6 mm
Product Net Weight: 232.5g
Package Gross Weight: 336.8g
Drive Activity LED Indication: Drive power: solid green; Drive access: flashing green
Package Contents: Device, user manual, screw, thermal pads
 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):

  • MB840TP-B

Related Products:

Related Products Series:

  • NVMe Enclosures
  • Space-Saving Enclosures

ToughArmor Lineup:


Q: How can I ensure the motherboard and PCIe slots are compatible with the MB842MP-B?

A: To ensure compatibility with the MB842MP-B, the motherboard must support PCIe Bifurcation mode, allowing configurations such as x4/x4/x4/x4 for a PCIe 16x slot or x4/x4 for a PCIe 8x slot. The number of CPU lanes on the motherboard also determines if the MB842MP-B can recognize two M.2 NVMe SSDs. For a detailed list of compatible and incompatible motherboards and to identify which PCIe slots can be utilized in conjunction with the MB842MP-B, please click the icon below and follow the steps provided.

Note: The compatibility list features motherboards with validated PCIe x16 slots. For PCIe x8 slots or motherboards not on the list, confirm PCIe Bifurcation support with the motherboard manufacturer.

To report a compatible or incompatible motherboard, or to check the compatibility of a motherboard not listed, please click here

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: Is the ICY DOCK NVMe enclosure supporting the PCIe 4.0 standard?

A: Yes, all ICY DOCK NVMe enclosures support the PCIe 4.0x4 standard, with up to 64Gbps transfer rates.

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.

Metal heat dissipation sticker


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 due to physical fitment 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 want to see the drive status from the front panel on PC case/chassis. What should I do?

A: There is a 2-pin front panel header(s) on the PCBA of the product. The drive status can be displayed from the front panel after connecting the front I/O wire to the corresponding 2-pin header of the product. For detailed connected methods, please refer to the user manual of the PC case/chassis.

Drive Status LED Indication
Power Solid Light
Drive Access Flashing Light

Note: The I/O wire connected to the PC case/chassis are not included in the product package.

Q:When I install the card to my system, my system refuses to boot or go into BIOS?

A:Check to see if there are any BIOS updates for the motherboard of the system. A few restarts after updating BIOS may be needed before MB842MP-B is usable. Follow the instructions on BIOS updates with the manufacturer of the motherboard. If issue still persist after BIOS update, please contact us.


By Nikktech

The ICY DOCK ToughArmor MB842MP-B is basically an PCIe card (anti-EMI) with two removable drive trays made out of aluminum (optimal heat dissipation) for M.2 NVMe SSDs.

Mar 11, 2024

By OCinside.de

Today, at OCinside.de we are testing the Icy Dock MB842MP-B, a useful PCIe adapter for NVMe SSDs, which allows two NVMe SSDs to be easily exchanged via the back of the PC without having to open the PC case.

Oct 1, 2023


Icy Dock has launched the ToughArmor MB842MP-B, a PCIe card with removable bays for two M.2 SSDs. The MB842MP-B is an upgrade over the MB840M2P-B, which Icy Dock launched three years ago.

Apr 26, 2023

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