NVIDIA Mellanox® MCX623106TN-CDAT — ConnectX-6 Dx 100GbE Dual-Port QSFP56 NIC with Enhanced SyncE & IEEE 1588 PTP (PCIe 4.0 x16, No Crypto, Tall Bracket) — Refurbished
Technical Identity
The NVIDIA Mellanox MCX623106TN-CDAT is a dual-port 100GbE ConnectX-6 Dx network adapter with hardware-precision timing. The T suffix designates the timing-capable variant — onboard PTP Hardware Clock (PHC), Enhanced SyncE (eSyncE), and 1PPS In/Out via an onboard SMA connector. The N suffix designates the non-crypto / no-secure-boot SKU. The card is purpose-built for 5G O-RAN fronthaul / midhaul, telecom transport, MEC, financial-trading time-distribution, and Time-Sensitive Networking (TSN) workloads where nanosecond-class clock alignment is required. PCIe 4.0 x16 host interface, full-height tall bracket. End-of-life — supplied refurbished from EU stock.
Specifications
Brand: NVIDIA Mellanox
Model / MPN: MCX623106TN-CDAT
Product family: ConnectX-6 Dx (Ethernet, Timing-capable)
ASIC: ConnectX-6 Dx (Ethernet-only)
Ports: 2× QSFP56
Line rates per port: 1 / 10 / 25 / 40 / 50 / 100 GbE
Aggregate bandwidth: 200 Gb/s
Host interface: PCIe 4.0 x16 (PCIe 3.0 x16 compatible at reduced bandwidth)
Cryptography: Disabled (N variant — no IPsec/TLS inline offload, no Secure Boot)
Timing hardware: PTP Hardware Clock (PHC), Enhanced SyncE per ITU-T G.8262.1, 1PPS-In and 1PPS-Out via onboard SMA
PTP profiles: ITU-T G.8275.1 (full on-path), G.8275.2 (partial on-path), IEEE 1588-2008 default
Form factor: Full-height, tall bracket, single-slot PCIe card
Typical power: ~17 W
Condition: Refurbished
What This Is NOT
NOT InfiniBand-capable — ConnectX-6 Dx is Ethernet-only. For VPI dual-protocol (IB + Ethernet) use the ConnectX-6 VPI MCX65 series.
NOT a crypto-enabled NIC — the N suffix removes IPsec/TLS inline offload and Secure Boot. For inline encryption choose the AN/AC variants.
NOT a 200 / 400 GbE adapter — peak line rate is 100 GbE per port (200 Gb/s aggregate).
NOT QSFP-DD or OSFP — uses QSFP56 cages only; QSFP+ and QSFP28 modules are mechanically backward-compatible at 40/100 GbE.
NOT a GPS grandmaster — the card consumes PTP/SyncE; an upstream grandmaster or boundary clock is required to deliver a traceable reference.
NOT supplied with QSFP56 transceivers, DAC/AOC cables, or SMA cables.
Compatibility & Hard Constraints
Host slot: PCIe 4.0 x16 recommended; operates in PCIe 3.0 x16 at reduced bandwidth.
Cabling (QSFP56): NVIDIA LinkX QSFP56 DAC (MCP1600-C0xx family), QSFP56 AOC (MFA1A00-Cxxx), or 100G/200G QSFP56 optical transceivers (MMA1B00-C100D, MMS1V00 family).
Recommended head-end switches: NVIDIA Spectrum-2 SN3700 / SN3700-V or Spectrum-3 SN4000 series; any 100GbE QSFP28/QSFP56 Ethernet switch is electrically compatible.
Drivers: MLNX_OFED 5.x or later, DOCA-Host, or in-box drivers in RHEL 8+, Ubuntu 20.04+, SLES 15+, Windows Server 2019+.
Timing integration: SMA jack is 50-ohm — use standard 50-ohm coax for 1PPS distribution (cables not included). PTP4L / phc2sys (linuxptp) or vendor stacks are required for software stack assembly.
EOL: Firmware and driver support is on long-tail. Verify firmware revision (mlxconfig / mlxfwmanager) and OS driver support for your target deployment before ordering.
Frequently Asked Questions (FAQ)
Q. What is the MCX623106TN-CDAT and what makes the TN variant different?
The MCX623106TN-CDAT is an NVIDIA ConnectX-6 Dx dual-port 100GbE QSFP56 NIC with onboard hardware timing. The T suffix denotes the timing-capable variant with PTP Hardware Clock, Enhanced SyncE, and SMA 1PPS In/Out. The N suffix denotes the non-crypto / non-secure-boot SKU. It is the canonical NIC for 5G O-RAN fronthaul, telecom transport, and time-sensitive networking.
Q. Is the MCX623106TN-CDAT InfiniBand capable?
No. ConnectX-6 Dx is Ethernet-only. For VPI dual-protocol (InfiniBand + Ethernet) use the ConnectX-6 VPI MCX65 series. The Dx ASIC supports RoCE v2 RDMA over Ethernet but does not run InfiniBand fabric.
Q. What timing accuracy and PTP profiles does this card support?
Hardware timestamping delivers nanosecond-class accuracy at the wire. Supported PTP profiles include ITU-T G.8275.1 (full on-path), G.8275.2 (partial on-path), and IEEE 1588-2008 default. Enhanced SyncE per G.8262.1 carries frequency synchronization. 1PPS-In/Out via onboard SMA allows integration with an external grandmaster or measurement instrument.
Q. What switches and cables pair with the MCX623106TN-CDAT?
Typical head-end: NVIDIA Spectrum-2 SN3700 or Spectrum-3 SN4000 100GbE switches. Cabling: QSFP56 DAC (MCP1600-C0xx), QSFP56 AOC (MFA1A00-Cxxx), or QSFP56 optics (MMA1B00-C100D). QSFP28 100GbE modules are backward-compatible mechanically. Cables and transceivers are not included.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished Grade A — EEPROM-verified, PCIe link tested where bench topology permits, cosmetically inspected, supplied in ESD-safe anti-static packaging, EU stock. EOL firmware/driver verification for the target host OS is the buyer's responsibility.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based NVIDIA Mellanox specialist supplying timing-capable ConnectX adapters for 5G O-RAN, telecom transport, and TSN deployments. Every unit is identified by MPN, NVIDIA P/N, and ASIC generation before it ships. Multi-currency B2B invoicing, EU stock with worldwide express options, and direct engineering contact for switch / cable / firmware pairing before purchase.
Quality Assurance
All refurbished NVIDIA Mellanox adapter cards supplied by T.E.S IT-SOLUTIONS are inspected for physical condition, MPN verification, bracket integrity, connector/port condition, and EEPROM identity. Units are packed in ESD-safe anti-static packaging and shipped from EU stock.