NVIDIA Mellanox MCX415A-CCAT ConnectX-4 EN 100GbE Single-Port QSFP28 Network Interface Card, PCIe 3.0 x16: This is a single-port 100GbE Ethernet network adapter (NIC) built on the NVIDIA Mellanox ConnectX-4 EN ASIC. The card provides one QSFP28 port operating at up to 100GbE and connects to the host over a PCIe 3.0 x16 slot. This is a server adapter card, not a switch and not a transceiver. Tall (full-height) PCIe bracket. This is a refurbished unit (NVIDIA P/N 900-9X4AC-0016-ST1).
Engineering Context
The MCX415A-CCAT is the single-port 100GbE variant of the ConnectX-4 EN family. The QSFP28 cage runs 4x25Gb/s NRZ for 100GbE and supports auto-negotiation down to 10/25/40/50GbE. The PCIe 3.0 x16 host interface (~126 Gb/s usable) is sized to feed a single 100GbE port at line rate. The ASIC implements stateless TCP/UDP/IP offloads, RDMA over Converged Ethernet (RoCE v1 and v2), VXLAN, NVGRE and Geneve hardware encapsulation/decapsulation, and SR-IOV with up to 256 virtual functions.
Deployment & Use Cases
NVMe-oF over RoCE storage targets and initiators. AI training nodes connecting into 100GbE Spectrum or Cumulus fabrics. Hyperconverged infrastructure (vSAN, Nutanix, Azure Stack HCI) needing 100GbE east-west capacity. OpenStack/VMware virtualized data centers using SR-IOV per-VM acceleration. Telco NFV with DPDK pipelines.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number (MPN): MCX415A-CCAT
NVIDIA P/N: 900-9X4AC-0016-ST1
Controller / ASIC: ConnectX-4 EN
Ports: 1 x QSFP28
Maximum Data Rate: 100GbE (4x25Gb/s NRZ); auto-negotiates 10/25/40/50/100GbE
Host Interface: PCI Express 3.0 x16 (8 GT/s)
Bracket: Tall (full-height)
RDMA / Offloads: RoCE v1/v2, VXLAN, NVGRE, Geneve, stateless TCP/UDP offloads
SR-IOV: Up to 256 virtual functions
Form Factor: Standard low-profile PCIe card with tall bracket installed
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Requires a PCIe 3.0 x16 slot for line-rate 100GbE. A PCIe 3.0 x8 slot will physically fit but cap throughput at roughly 63 Gb/s. Pairs with QSFP28 100GbE DAC cables, AOCs, or transceivers (SR4, LR4, etc.). Not compatible with InfiniBand fabrics — this is an Ethernet-only (EN) part. SFP/SFP+ optics are not supported in the QSFP28 cage without a QSA28 adapter. Driver support: MLNX_OFED on Linux, WinOF-2 on Windows, and inbox drivers in modern kernels and ESXi 6.7+.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS bench-tests every ConnectX-4 NIC for link-up at 100GbE, RDMA functionality, firmware integrity, and physical bracket condition before shipping. We provide expert consultation on 100GbE Ethernet fabric design, global shipping, and a 1–3 day handling time. Visit tes-itsolutions.com for the full catalog.
Frequently Asked Questions
What part number (mpn) does the MCX415A-CCAT have?
The MCX415A-CCAT part number (mpn) is MCX415A-CCAT, as listed in the specifications for MCX415A-CCAT.
What is the MCX415A-CCAT NOT compatible with?
This is a server adapter card, not a switch and not a transceiver. Confirm fitment against your platform before ordering MCX415A-CCAT.
What condition is the MCX415A-CCAT supplied in, and who sells it?
The MCX415A-CCAT is supplied in Refurbished condition by T.E.S IT-SOLUTIONS from EU stock, with 1-3 business day handling and worldwide B2B shipping. See https://www.tes-itsolutions.com/product-page/mellanox-mcx415a-ccat-ethernet-100gbe-single-port-qsfp28-pcie3-0-x16.