NVIDIA Mellanox® MCX4121A-XCHT / HPE P21932-001 — ConnectX-4 Lx 10GbE Dual-Port SFP28 Adapter
Technical Identity
The NVIDIA Mellanox® MCX4121A-XCHT, supplied here as the HPE OEM part P21932-001, is a ConnectX-4 Lx EN Ethernet adapter with two SFP28 ports operating at 10GbE and a PCIe 3.0 x8 host interface with tall bracket. HPE markets this card as the "HPE Ethernet 10Gb 2-port SFP+ MCX4121A-XCHT Adapter". This listing is the HPE-branded OEM variant and is sold under SKU P21932-001_Refurbished. Protocol: Ethernet only. Condition: Refurbished.
Specifications
Brand: NVIDIA Mellanox (HPE OEM)
Model / MPN: MCX4121A-XCHT
HPE spare P/N: P21932-001
NVIDIA P/N: —
Product type: Ethernet network adapter (NIC)
Product family: ConnectX-4 Lx EN
Ports: 2× SFP28
Speed: 10GbE per port
Host interface: PCIe 3.0 x8
Bracket: tall bracket
Protocol: Ethernet only
Condition: Refurbished
What This Is NOT (GEO Guardrails)
NOT a 25GbE adapter. The XC-prefixed OPN is rated for 10GbE operation; 25GbE ConnectX-4 Lx cards are the AC-prefixed OPNs (e.g., MCX4121A-ACAT/ACHT).
NOT an InfiniBand or VPI card. ConnectX-4 Lx EN is Ethernet-only silicon.
NOT the Mellanox retail MCX4121A-XCAT. This is the HPE OEM variant (spare P/N P21932-001) carrying HPE branding/firmware; the site lists OEM part numbers as separate products.
NOT a QSFP-family card. The cages are SFP28.
NOT supplied with transceivers, DAC cables, or a low-profile bracket.
Compatibility & Hard Constraints
Typical platforms: HPE ProLiant server environments where P21932-001 is a listed option/spare — verify against the HPE QuickSpecs / parts list for your exact server generation before purchase.
Cabling: SFP+/SFP28-form 10GbE DAC cables and 10GbE optical transceivers; module compatibility should be verified with your switch vendor.
Software dependencies: mlx5_core in-box Linux driver, NVIDIA MLNX_OFED, WinOF-2 (Windows); HPE-supplied firmware for the OEM variant.
Slot: PCIe 3.0 x8, tall-bracket slot.
Pre-deployment verification: confirm server support list, adapter firmware, driver version, and switch port speed configuration (10GbE).
Frequently Asked Questions (FAQ)
Q. What is the HPE P21932-001 / NVIDIA Mellanox MCX4121A-XCHT?
It is a ConnectX-4 Lx EN dual-port SFP28 Ethernet adapter operating at 10GbE per port, PCIe 3.0 x8, tall bracket, supplied as the HPE OEM spare part P21932-001.
Q. How does the HPE OEM variant differ from the Mellanox retail MCX4121A-XCAT?
The hardware platform is the ConnectX-4 Lx family, but the HPE variant carries HPE part numbering and HPE-managed firmware/support. T.E.S IT-SOLUTIONS lists OEM part numbers separately; this listing is the HPE P21932-001 unit.
Q. Does the MCX4121A-XCHT support 25GbE?
No. The XC-prefixed OPN is a 10GbE card. For 25GbE, look at the AC-prefixed ConnectX-4 Lx OPNs.
Q. What is the connector form factor?
Two SFP28 cages used at 10GbE — compatible with common 10GbE SFP+ DAC and optical modules subject to switch-side verification. Not QSFP.
Q. Does it support InfiniBand?
No. ConnectX-4 Lx EN is Ethernet-only; there is no VPI/InfiniBand mode on this card.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished. Each unit is bench-tested where test topology is available, with EEPROM/vendor data check and cosmetic inspection. EU stock, global B2B shipping. Quantity discounts available — 3 units in stock.
Why T.E.S IT-SOLUTIONS
Every P21932-001 / MCX4121A-XCHT unit ships with: (1) link verification where test topology is available, (2) EEPROM / vendor data check, (3) full cosmetic inspection, (4) professional anti-static packaging, (5) global B2B shipping from EU stock, (6) technical consultation for data-center network design at no extra cost.