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- Description
- Specifications
HPE's Ethernet Adapters QuickSpecs list P42044-B21 as the Mellanox MCX631102AS-ADAT Ethernet 10/25Gb 2-port SFP28 Adapter for HPE: a stand-up PCIe network card, not a transceiver, with two SFP28 cages. It appears in HPE's adapter tables for Gen10 Plus and Gen11 servers. PartSurfer gives its spare as P42934-001.
The card uses a PCIe 4.0 x8 link and draws 13 W typical, 18.4 W maximum. Ports auto-negotiate 1, 10 or 25Gb, and unlike HPE's Broadcom BCM57414 cards, HPE notes that Mellanox adapters support different speeds on the two ports of the same card. Optics or DAC cables are bought separately.
Listed features include RoCE v1 and v2 RDMA, SR-IOV with 512 virtual functions shared across ports, VXLAN/NVGRE/GENEVE tunnel offload, DPDK, UEFI and legacy PXE boot, UEFI iSCSI remote boot, and a hardware root of trust with authenticated updates and secure boot. HPE recommends the same adapter at both ends of a RoCE link.
Siblings: P42041-B21 is the OCP 3.0 version (Mellanox MCX631432AS-ADAI) with the same speeds, power and features plus Wake-on-LAN, for servers with a free OCP slot. The stand-up P42044-B21 suits servers whose OCP slots are taken or that need a second 25Gb adapter in a PCIe slot. On the Broadcom side, the 2-port 10/25Gb stand-up card is P26262-B21.
To confirm fit, check for a free PCIe x8 or wider slot, the bracket height your riser needs, and that the server and OS are listed for this adapter in HPE's QuickSpecs or SPOCK.
More from this family: HPE Interface Card.
| P42044-B21 Specs | |
| Option part | P42044-B21 |
| Spare part | P42934-001 |
| Controller | Mellanox MCX631102AS-ADAT |
| Form factor | stand-up PCIe card |
| Ports | 2 x SFP28 |
| Speeds | 1 / 10 / 25 Gb; mixed speeds across ports supported |
| Host bus | PCIe 4.0 x8 |
| Power | 13 W typical, 18.4 W max |
| RDMA | RoCE v1, RoCE v2 |
| Virtualization | SR-IOV, 512 VF total |
| Security | hardware root of trust, secure boot |
| Platforms | HPE Gen10 Plus and Gen11 |
| OCP3 version | P42041-B21 |