Dell Dual M.2 Slot NVMe SSD PCIe BOSS Adapter Card - Low Profile

In this review of the Dell Dual M.2 Slot NVMe SSD PCIe BOSS Adapter Card (K4D64) the bottom line is simple: this is a practical internal upgrade for builders and IT technicians who need to add two high-speed M.2 slots to a PCIe-equipped system. The reviewer found the card to be straightforward and purpose-built, delivering dual-device support in a compact, low-profile form factor that suits rack, tower, and small workstation builds. For anyone wanting a Dell-branded adapter that respects server and desktop space constraints, this card is an uncomplicated, dependable option.

Key Features

• Dual M.2 slots: Provides two M.2 slots that accept 2280 and 22110 sizes so users can install two NVMe drives for added capacity or RAID configurations.
• PCI-E interface: Uses a standard PCI-E card interface to add M.2 NVMe support to a compatible motherboard without onboard M.2 connectors.
• Dell manufacture: As a Dell OEM part, the adapter matches chassis and compatibility expectations for many Dell systems where official components are preferred.
• Low profile design: The low-profile bracket and compact PCB allow installation in small form-factor systems and constrained rack spaces.
• Simple function: Acts as a plain adapter/controller card so setup focuses on drive installation and system BIOS/OS configuration rather than complex management tools.

Who It's For

This card is best for system builders, IT administrators, and technicians who need a straightforward way to add two NVMe M.2 drives to a PCIe slot, especially in Dell environments where OEM parts can simplify support and compatibility. It is also suited to lab systems and workstations that require faster local storage without replacing the motherboard.

It is not targeted at casual users who expect bundled software, active cooling, or integrated RAID controllers; those seeking advanced hardware RAID or purpose-built NVMe cooling solutions should look elsewhere. Also, compatibility depends on host motherboard and BIOS support for M.2 over PCI-E adapters.

Pros & Cons

Pros

• Enables two NVMe M.2 drives in a single PCI-E slot, expanding storage capacity efficiently.
• Supports both 2280 and 22110 M.2 lengths, giving flexibility for enterprise and consumer drives.
• Low-profile form suits compact systems where full-height cards will not fit.

Cons

• Does not include active cooling or bundled RAID management, so thermal and configuration care fall to the installer.

Specifications

Manufacturer	Dell
Part Number	K4D64-LOW PROFILE
Device Type	PCIe to M.2 adapter card
Card Interface	PCI-E
Slots	2 M.2 slots (2280 / 22110)
Form Factor	Low profile

Our Verdict

The Dell Dual M.2 Slot NVMe SSD PCIe BOSS Adapter Card is a focused, no-frills solution for adding two NVMe drives to systems with available PCI-E lanes. It is good value for administrators and builders who need OEM compatibility and a low-profile footprint, though installers should plan for thermal and BIOS configuration tasks themselves.

Frequently Asked Questions

Will this card fit in small form-factor systems?
The card is low-profile, so it is designed to fit many compact systems, but installers should confirm bracket height and available PCI-E space before purchase.

What M.2 sizes does it support?
It supports two M.2 device lengths: 2280 and 22110, covering most consumer and enterprise NVMe drives.

Does it include RAID or cooling features?
No, the adapter provides slots and connectivity only; RAID functionality and active cooling are not included and must be handled by the host system or additional components.