What ports and speeds does the Dell 31XR6 support?

The 31XR6 features dual 100GbE QSFP56 ports, each providing 100Gbps wire-speed Ethernet connectivity. QSFP56 transceivers support 100GBASE-SR4, DR, FR, LR4 optics for multimode and single-mode fiber up to 10km, enabling flexible cabling in data center and edge deployments.

Which PCIe interface and form factor is used?

It utilizes PCIe 4.0 x16 host interface with a low-profile bracket, ensuring compatibility with half-height slots in 1U servers. Backward compatible with PCIe Gen3, it maintains full 200Gbps bandwidth without bottlenecks in modern PowerEdge systems.

What servers is the 31XR6 validated for?

Dell validates the 31XR6 on PowerEdge XR11, XR12, and XR7620 servers. These rugged platforms support OCP 3.0 and PCIe Gen4/5 slots, making it ideal for NEBS/MIL-STD edge and telco environments with extended temperature ranges.

Does it support RDMA and virtualization features?

Yes, the Broadcom 57508 enables RoCEv2, iWARP for low-latency RDMA. SR-IOV provides up to 128 virtual functions, while VMDq and NVGRE/VXLAN offloads enhance NFV and SDN performance in virtualized data centers.

What OS and drivers are compatible?

Broadcom drivers support Windows Server 2019/2022, RHEL 8/9, SLES 15, Ubuntu 20.04/22.04, and VMware ESXi 7/8. Dell provides validated firmware and TOEs for seamless integration with PowerEdge iDRAC management.

How does it handle high-throughput workloads?

Hardware offloads for TCP/IP, UDP, iSCSI, FCoE, and NVMe-oF reduce CPU load by 40-60%. Deep packet buffers and intelligent flow control prevent drops in bursty AI/HPC traffic patterns.

31XR6 - Dell 31XR6 57508 2x100GbE QSFP56 PCIe4 x16 Low Profile NIC

Name: Dell 31XR6 57508 2x100GbE QSFP56 PCIe4 x16 Low Profile NIC
Brand: Dell
SKU: 31XR6

31XR6 - Dell 31XR6 57508 2x100GbE QSFP56 PCIe4 x16 Low Profile NIC | US IT Hardware

Product overview

The Dell 31XR6, featuring the Broadcom 57508 controller, is a high-performance dual-port 100GbE QSFP56 Network Interface Card designed for PCIe 4.0 x16 slots with a low-profile bracket. It provides 100Gbps per port for aggregate 200Gbps bandwidth, enabling ultra-low latency and high-throughput connectivity in demanding data center environments. Optimized for Dell PowerEdge XR-series servers including XR11, XR12, and XR7620, this adapter supports advanced features like RDMA over Converged Ethernet (RoCE), iWARP, and hardware offloads for TCP/IP, UDP, and storage protocols. Its compact form factor fits space-constrained racks, while PCIe Gen4 interface ensures full line-rate performance without bottlenecks. Ideal for AI/ML workloads, hyperscale cloud infrastructure, and high-frequency trading where every microsecond counts. Robust driver support across OS including Linux, Windows Server, and VMware ensures seamless integration and reliability in virtualized setups. Engineered for enterprise scalability, it reduces CPU overhead through intelligent packet processing and virtualization accelerations like SR-IOV and VMDq.

Dual 100GbE QSFP56 ports deliver 200Gbps full line-rate throughput.
PCIe 4.0 x16 interface with low-profile bracket for dense servers.
Broadcom 57508 controller supports RoCEv2, iWARP, SR-IOV offloads.
Optimized for PowerEdge XR11, XR12, XR7620 rugged platforms.
Hardware TCP/UDP/IP storage offloads reduce CPU utilization.
Advanced virtualization with VMDq and 128 virtual functions.

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Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Virtualization
Manufacturer part #	31XR6
Brand	Dell
Condition	New
MTBF	>2 million hours
Model	31XR6 / 540-BDEE
Offloads	TCP/UDP/IP/iSCSI/FCoE/RoCEv2/iWARP
Protocols	100GBASE-SR4/DR/FR/LR4
Controller	Broadcom 57508
RSS Queues	Up to 128
Product Line	Broadcom 57508 Adapter
Product Type	100GbE Dual-Port PCIe NIC

Compatible systems

Native support in Dell PowerEdge XR rugged servers; broad OS compatibility with Broadcom drivers. Requires QSFP56 optics/cables for full 100G operation.

Dell PowerEdge
Model: XR11
Form factor: 1U Rugged
Generation: Current
Validated out-of-box with PCIe Gen4 slots
Dell PowerEdge
Model: XR12
Form factor: 1U Rugged
Generation: Current
Validated out-of-box with PCIe Gen4 slots
Dell PowerEdge
Model: XR7620
Form factor: 2U Rugged
Generation: Current
Validated out-of-box with OCP 3.0/PCIe slots

Best for

Data Center Top-of-Rack
Provides 200Gbps aggregate bandwidth for spine-leaf architectures handling massive east-west traffic in hyperscale environments.
AI/ML Training Clusters
RoCEv2 support enables low-latency GPU-to-GPU communication for accelerated deep learning workloads on PowerEdge XR servers.
Cloud Infrastructure
SR-IOV and VMDq virtualization offloads boost VM density and performance in KVM or VMware hypervisors.

Details

Shipping, warranty & returns

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Data Rate	100Gbps per port / 200Gbps aggregate
Jumbo Frames	Up to 16KB
Supported Media	MMF/SMF up to 10km

Dimensions	Half-height, low-profile PCIe card
Form Factor	Low Profile (LP) bracket

Ports	2 x 100GbE QSFP56
Interface	PCIe 4.0 x16
Cable Types	QSFP56 DAC/AOC/Fiber

Dell 31XR6 57508 2x100GbE QSFP56 PCIe4 x16 Low Profile NIC

Product overview

Featuring

Compatible systems

Best for

Details

Shipping, warranty & returns

Customer reviews

Network & Communication

Power Consumption

Physical Characteristics

Environmental

Interface/Ports

Frequently asked questions