HPE P24839-001 — 642SFP28 Ethernet 10/25GbE Dual-Port SFP28 Adapter
Technical Identity
HPE 642SFP28 dual-port 10/25 Gigabit Ethernet adapter, HPE part number P24839-001. The card is built on NVIDIA Mellanox ConnectX-5 EN silicon, HPE-qualified for ProLiant Gen10 servers, in a low-profile standard PCIe form factor with a PCIe 3.0 x8 host interface. Each SFP28 port auto-negotiates between 10GbE and 25GbE, with full hardware offload for RoCE v2, NVMe over Fabrics, VXLAN, GENEVE, NVGRE, SR-IOV, and Open vSwitch. Supplied refurbished Grade A from EU stock, EEPROM-verified and link-tested.
Specifications

Brand: HPE (OEM — NVIDIA Mellanox ConnectX-5 EN inside)
HPE Part Number: P24839-001
HPE Model: 642SFP28
Ports: 2 × SFP28 (10GbE or 25GbE per port)
Protocol: Ethernet only — no InfiniBand, no VPI
Silicon: NVIDIA Mellanox ConnectX-5 EN
Host Interface: PCIe 3.0 x8
Form Factor: Low-profile, standard PCIe
Server Qualification: HPE ProLiant Gen10 (DL360, DL380, DL385, ML350, Apollo 4200, Synergy)
Hardware Offloads: RoCE v2, NVMe-oF, VXLAN, GENEVE, NVGRE, SR-IOV, OVS, T10-DIF
Security: Secure boot, hardware root of trust, signed firmware
OS Drivers: RHEL, SLES, Ubuntu, Windows Server 2016/2019/2022, VMware ESXi (HPE SPP / NVIDIA OFED)
Condition: Refurbished Grade A — EEPROM-verified, link-tested
Stock: EU warehouse

What This Is NOT

NOT InfiniBand. Ethernet EN only — no IB and no VPI dual-protocol mode.
NOT 40/50/100GbE. Maximum 25GbE per port. For 50GbE or 100GbE move to ConnectX-6 / HPE 874251-001 class adapters.
NOT a standard NVIDIA retail card. HPE OEM firmware — outside HPE ProLiant servers some features may be restricted. Verify before deploying in third-party chassis.
NOT bundled with optics. SFP28 transceivers and DAC/AOC cables are sold separately.
NOT new. Supplied refurbished Grade A.

Compatibility
HPE-validated for ProLiant DL360 Gen10, DL380 Gen10, DL385 Gen10, ML350 Gen10, Apollo 4200 Gen10, and Synergy Gen10 server platforms. Up-link pairs with any standard 10/25GbE Ethernet switch carrying SFP28 ports — NVIDIA Spectrum-1 (SN2010, SN2100, SN2410, SN2700), Spectrum-2 (SN3000-series), Cisco Nexus 9300 25GbE, Arista 7050X / 7280R, Dell PowerSwitch S5200, or HPE / Aruba CX 8325. Compatible with HPE-branded SFP28 25GbE DAC and AOC cables, and SFP28 25GbE SR / LR transceivers. Driver stacks ship in HPE Service Pack for ProLiant (SPP) and the NVIDIA MLNX_OFED package for Linux and VMware.
Frequently Asked Questions (FAQ)
Q. What is the HPE P24839-001?
HPE 642SFP28: a dual-port 10/25GbE SFP28 Ethernet adapter based on NVIDIA Mellanox ConnectX-5 EN silicon, qualified for HPE ProLiant Gen10 servers, with RoCE v2, NVMe-oF and SR-IOV hardware offloads.
Q. Does P24839-001 support both 10GbE and 25GbE?
Yes — each SFP28 port auto-negotiates 10GbE or 25GbE depending on the connected switch port mode and the cable or transceiver installed.
Q. Is P24839-001 InfiniBand capable?
No — Ethernet EN only. There is no IB or VPI mode on this part number.
Q. Can P24839-001 be used outside HPE ProLiant servers?
Mechanically yes, but the OEM firmware may restrict features or refuse to load in non-HPE chassis. Test in your environment before production deployment.
Q. What condition does T.E.S IT-SOLUTIONS supply?
Refurbished Grade A — EEPROM-verified, link-tested, cosmetically inspected, supplied from EU stock with multi-currency invoicing.
Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based data-center networking specialist. Every adapter is MPN-identified, EEPROM-verified, and link-tested before leaving our EU warehouse. Multi-currency invoicing, worldwide express shipping, and free pre-sale technical consultation included.