540-BCND: Dell Mellanox ConnectX-6 Lx Dual Port 25GbE SFP28 PCIe Adapter

Also listed as: 090G3V, 90G3V, MCX631102AN-ADAT · made by NVIDIA

The Dell 540-BCND is a Dell Mellanox ConnectX-6 Lx Dual Port 25GbE SFP28 PCIe Adapter delivering 25GbE network connectivity across 2x 25GbE SFP28 via PCIe 4.0 x8. Built with NVIDIA controller architecture, the 540-BCND provides hardware offload acceleration and virtualization support for R750, R650, R760, R660 enterprise servers.

Specifications

About the 540-BCND

The Dell 540-BCND is a Dell Mellanox ConnectX-6 Lx Dual Port 25GbE SFP28 PCIe Adapter engineered to deliver 25GbE network transmission across 2x 25GbE SFP28 over PCIe 4.0 x8. Powered by NVIDIA controller architecture on the 540-BCND, it executes hardware-level protocol processing, RoCE, and SR-IOV virtualization while maintaining a thermal envelope of approximately 11W. In Dell's networking portfolio, 540-BCND provides dedicated high-bandwidth fabric connectivity for clustered virtualization, network storage, and enterprise database hosts.

Compatibility

Engineered for Dell PowerEdge servers including R750, R650, R760, R660, the 540-BCND mounts directly into FHHL / LPHL PCIe Adapter locations. The 540-BCND installs into a standard PCIe 4.0 x8 expansion riser slot with matching bracket profile. Cabling the 540-BCND requires 25GbE-rated media, including direct attach copper twinaxial assemblies, optical transceivers, or patch leads matched to its physical ports. Supported operating systems on the 540-BCND include VMware ESXi, Red Hat Enterprise Linux, and Windows Server with native Dell drivers.

How to identify a genuine unit

Authentic Dell 540-BCND units carry an identification label displaying DP/N 090G3V and NVIDIA model code MCX631102AN-ADAT along with Dell regulatory marks. In iDRAC Network Devices inventory, the card registers under part number 540-BCND with active link state, port MAC addresses, negotiated speed, and certified Dell firmware. Onboard physical indicators on the 540-BCND provide link status and port activity monitoring.

Buying used

When purchasing a pre-owned 540-BCND, examine the gold edge connector fingers for scratches, peeling contacts, or missing surface-mount capacitors. Ensure that the 540-BCND PCIe mounting bracket (low-profile or full-height) is intact and properly aligned for chassis installation. Validate in iDRAC Lifecycle Controller that the 540-BCND is recognized with certified Dell firmware and passes diagnostics under sustained 25GbE network traffic.

Fits these models

• Dell PowerEdge R750
• Dell PowerEdge R650
• Dell PowerEdge R760
• Dell PowerEdge R660
• Dell PowerEdge R740
• Dell PowerEdge R640

Works together

How the Dell 540-BCND connects to servers, storage and the network: 3 ways, with the hardware on each path.

Plan and size it

• Draw this setup in the topology planner mrplanb.com
• Add up rack power and space rack-density.com
• iSCSI explained mrplanb.com
• Virtualization storage Ledger: scored storage platforms mrplanb.com
• Network monitoring tools compared mrplanb.com
• Dell E-Lab Navigator (Dell interoperability) dell.com

Equivalent part numbers

• NVIDIA MCX631102AN-ADAT NVIDIA Mellanox ConnectX-6 Lx EN 25GbE Dual-Port SFP28 PCIe OEM base

FAQ

Sources

• Dell Mellanox ConnectX-6 Lx Dual Port 25GbE Adapter Specifications, checked 2026-10-27