Description

HPE 813661-B21 overview

The HPE 813661-B21 is a stand-up PCIe server adapter with two 10Gb Base-T RJ-45 Ethernet ports. It is for supported HPE ProLiant server configurations that connect to 10GBase-T switch ports using structured copper cabling.

Each port provides 20Gbps bi-directional bandwidth, for up to 40Gbps aggregate bi-directional theoretical bandwidth across both ports. The adapter uses the Broadcom BCM57416 network processor and a PCIe 3 x4 bus interface. Select this model where the network design uses RJ-45 copper rather than SFP+ fibre or direct-attach cables.

Specifications

Applications / who it is for

• HPE ProLiant deployments requiring two copper 10Gb Ethernet connections.
• Server installations with available PCIe slots and compatible riser arrangements.
• Networks using 10Gb Base-T RJ-45 switch ports and cabling suitable for the required distance.
• Configurations that require port teaming, VLAN planning, jumbo-frame validation, or end-to-end MTU checks.

Deployment checks

Confirm the server generation, PCIe slot, riser, bracket height, airflow, system ROM, firmware, operating-system driver availability, switch ports and cable specification. For full-distance 10GBase-T deployments, Cat6A is the usual cabling choice; existing Cat6 should be tested for the required link conditions.

Frequently asked questions

Does 813661-B21 use SFP+ modules?

No. The adapter provides two copper 10GBase-T RJ-45 ports.

What bandwidth does the HPE 813661-B21 provide?

Each port provides 20Gbps bi-directional bandwidth, with up to 40Gbps aggregate bi-directional theoretical bandwidth across both ports.

What should be checked before installing this adapter?

Confirm the server generation, PCIe slot, riser, supported adapter list, bracket height, airflow, system ROM, firmware, operating-system driver availability, switch ports and cable specification.

Related: 869585-B21 | 846633-B21 | B9F54A

Official manufacturer information: Hpe product page

Last updated: 8 October 2026