NVIDIA Mellanox MCX614106A-CCAT ConnectX-6 EN Adapter, 100GbE, Dual-Port QSFP56, PCIe 3.0 x16, Socket Direct: This enterprise network interface card (NIC) is the NVIDIA Mellanox ConnectX-6 EN, part number MCX614106A-CCAT (NVIDIA P/N 900-9X6B4-0056-DT1). It is a dual-port 100GbE Ethernet adapter with two QSFP56 ports over PCIe 3.0 x16. The CCAT suffix indicates crypto enabled and tall bracket. Socket Direct support enables split PCIe connectivity across two CPU sockets for reduced NUMA latency. This is a refurbished unit, tested by T.E.S IT-SOLUTIONS.
Engineering Context
The MCX614106A-CCAT delivers 100 Gb/s per QSFP56 port (200 Gb/s aggregate) over PCIe 3.0 x16 (128 Gb/s bidirectional bandwidth). Socket Direct technology uses two PCIe 3.0 x16 connections to split traffic across two CPU sockets, reducing NUMA-crossing latency in dual-socket servers. Hardware offloads include RoCE v2, SR-IOV (up to 1024 VFs), VXLAN/NVGRE encapsulation, NVMe-oF, GPUDirect RDMA, and hardware-accelerated IPsec/TLS (crypto enabled). The ConnectX-6 EN ASIC is Ethernet-only (no InfiniBand). Power consumption is approximately 30W typical.
Deployment & Use Cases
Dual-port 100GbE server connectivity for AI/ML training clusters with GPUDirect RDMA. Cloud and hyperscale data center Ethernet fabrics requiring high-density 100GbE. NVMe-over-Fabrics storage networking at 100 Gb/s per port. Virtualized environments on VMware ESXi or KVM with SR-IOV (up to 1024 VFs per adapter). Dual-socket servers leveraging Socket Direct for balanced NUMA access and reduced latency.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MCX614106A-CCAT
NVIDIA P/N: 900-9X6B4-0056-DT1
ASIC: ConnectX-6 EN
Type: Ethernet Network Adapter (NIC)
Speed: 100GbE per port (also 50/25/10GbE)
Ports: 2x QSFP56
Host Interface: PCIe 3.0 x16 (Socket Direct: 2x PCIe 3.0 x16)
Protocols: RoCE v2, VXLAN, NVGRE, SR-IOV, NVMe-oF, GPUDirect
SR-IOV VFs: Up to 1024
Crypto: Enabled (hardware IPsec/TLS offload)
Power Consumption: ~30W typical
Bracket: Tall (Full-Height)
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Ethernet Only: ConnectX-6 EN does not support InfiniBand. For InfiniBand + Ethernet (VPI), use ConnectX-6 VPI variants (MCX653105A or MCX653106A). PCIe 3.0 x16: Requires a physical x16 slot. For Socket Direct, two x16 slots are needed (one per CPU socket). Will function in a single x16 slot without Socket Direct. Dual Port: Two QSFP56 ports. For single-port 100GbE, use MCX613105A-CCAT. QSFP56 Ports: Accept QSFP56, QSFP28, and SFP28 via breakout. Not compatible with OSFP or QSFP-DD. Socket Direct: Requires motherboard support and dual PCIe x16 slots connected to separate CPU sockets. Predecessor: ConnectX-5 EN (MCX516A, 100GbE). Successor: ConnectX-7 EN (400GbE).
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS tests every refurbished ConnectX-6 EN adapter for dual-port connectivity, PCIe link negotiation, Socket Direct functionality, and thermal behavior. We provide expert consultation on 100GbE fabric design, global shipping with 1–3 business day handling, and a comprehensive warranty.