540-BBYS: Dell Broadcom 5720 Quad Port 1GbE BASE-T RJ45 PCIe Adapter
Also listed as: 0540-BBYS, FC9GN, 0FC9GN, BCM5720-4P · made by Broadcom
The Dell 540-BBYS is a Dell Broadcom 5720 Quad Port 1GbE BASE-T RJ45 PCIe Adapter delivering 1GbE network connectivity across 4x 1GbE RJ45 via PCIe 2.0 x4. Built with Broadcom controller architecture, the 540-BBYS provides hardware offload acceleration and virtualization support for R740, R640, R750, R650 enterprise servers.
Specifications
| Part number | 540-BBYS |
|---|---|
| Brand | Dell |
| Made by | Broadcom |
| Type | Network adapters |
| Other numbers | 0540-BBYS, FC9GN, 0FC9GN, BCM5720-4P |
| Status | current |
| Interface | PCIe 2.0 x4 |
| Form factor | FHHL / LPHL PCIe Adapter |
| Ports | 4x 1GbE RJ45 |
| Speed | 1GbE |
| Tdp (W) | 5 |
About the 540-BBYS
The Dell 540-BBYS is a Dell Broadcom 5720 Quad Port 1GbE BASE-T RJ45 PCIe Adapter engineered to deliver 1GbE network transmission across 4x 1GbE RJ45 over PCIe 2.0 x4. Powered by Broadcom controller architecture on the 540-BBYS, it executes hardware-level protocol processing, RoCE, and SR-IOV virtualization while maintaining a thermal envelope of approximately 5W. In Dell's networking portfolio, 540-BBYS provides dedicated high-bandwidth fabric connectivity for clustered virtualization, network storage, and enterprise database hosts.
Compatibility
Engineered for Dell PowerEdge servers including R740, R640, R750, R650, the 540-BBYS mounts directly into FHHL / LPHL PCIe Adapter locations. The 540-BBYS installs into a standard PCIe 2.0 x4 expansion riser slot with matching bracket profile. Cabling the 540-BBYS requires 1GbE-rated media, including direct attach copper twinaxial assemblies, optical transceivers, or patch leads matched to its physical ports. Supported operating systems on the 540-BBYS include VMware ESXi, Red Hat Enterprise Linux, and Windows Server with native Dell drivers.
How to identify a genuine unit
Authentic Dell 540-BBYS units carry an identification label displaying DP/N 0540-BBYS and Broadcom model code 0FC9GN along with Dell regulatory marks. In iDRAC Network Devices inventory, the card registers under part number 540-BBYS with active link state, port MAC addresses, negotiated speed, and certified Dell firmware. Onboard physical indicators on the 540-BBYS provide link status and port activity monitoring.
Buying used
When purchasing a pre-owned 540-BBYS, examine the gold edge connector fingers for scratches, peeling contacts, or missing surface-mount capacitors. Ensure that the 540-BBYS PCIe mounting bracket (low-profile or full-height) is intact and properly aligned for chassis installation. Validate in iDRAC Lifecycle Controller that the 540-BBYS is recognized with certified Dell firmware and passes diagnostics under sustained 1GbE network traffic.
Fits these models
- Dell PowerEdge R740
- Dell PowerEdge R640
- Dell PowerEdge R750
- Dell PowerEdge R650
- Dell PowerEdge R550
- Dell PowerEdge R450
- Dell PowerEdge R350
Equivalent part numbers
- Broadcom NetXtreme 5720 Quad-Port Broadcom BCM5720 Gigabit Ethernet controller OEM base
FAQ
Can this card be used in low-profile PCIe slots?
Yes, with the interchangeable low-profile metal bracket installed.
Does the Broadcom 5720 support Energy Efficient Ethernet (EEE)?
Yes, IEEE 802.3az Energy Efficient Ethernet reduces power draw during periods of low network activity.
Buying or selling 540-BBYS?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Dell Broadcom 5720 Quad Port 1GbE BASE-T Adapter Specifications, checked 2026-10-27