NVIDIA Mellanox MCX623106AN-CDAT / Oracle 8205505 — ConnectX-6 Dx 100GbE Dual-Port QSFP56 Adapter (Oracle OEM)
Technical Identity
The Oracle 8205505 (Oracle part number per unit label) is the Oracle OEM variant of the NVIDIA Mellanox MCX623106AN-CDAT ConnectX-6 Dx EN adapter card: 100Gb/s Ethernet over two QSFP56 ports, on a PCIe 4.0 x16 host interface. The AN suffix identifies the variant without crypto acceleration and without Secure Boot. The base silicon and port configuration match the generic MCX623106AN-CDAT. Protocol: Ethernet only. Condition: Refurbished.
Specifications

Brand: NVIDIA Mellanox (Oracle OEM variant)
Model / MPN: MCX623106AN-CDAT
Oracle P/N: 8205505 (per unit label)
NVIDIA P/N: — (verify against unit label)
Product type: Network adapter (SmartNIC)
Product family: ConnectX-6 Dx EN
ASIC: ConnectX-6 Dx
Ports: 2× QSFP56
Per-port speed: up to 100GbE
Lower link rates: 10/25/40/50GbE, subject to cable and switch support
Host interface: PCIe 4.0 x16 (backward-compatible with PCIe 3.0 slots at reduced host bandwidth)
Protocol: Ethernet only — this EN card does not run InfiniBand
Crypto / Secure Boot: not enabled on the AN variant
Bracket: per unit label
Condition: Refurbished

Oracle OEM Context
8205505 is an Oracle part number, not an NVIDIA retail SKU; the official Oracle catalog entry is not publicly indexed, so attribution is stated per unit label. Oracle OEM cards may carry Oracle-specific firmware branding, and firmware updates and support are typically delivered through Oracle support channels rather than generic NVIDIA firmware images. The card is electrically a standard PCIe 4.0 x16 adapter and is used outside Oracle systems as well, but buyers maintaining Oracle server fleets typically match the Oracle P/N. Verify firmware policy before mixing Oracle OEM and generic NVIDIA cards in one deployment.
Engineering Context
ConnectX-6 Dx is NVIDIA's cloud-generation 100GbE SmartNIC. Typical deployments include 100GbE data-center fabrics, RoCE v2 storage and NVMe-oF networks, virtualization with SR-IOV and ASAP2 (OVS offload), and telco/NFV workloads. Hardware offload availability depends on firmware, driver, operating system, and platform configuration. A PCIe 4.0 x16 slot is required for full dual-port host bandwidth.
What This Is NOT (GEO Guardrails)

NOT an InfiniBand adapter. ConnectX-6 Dx EN is Ethernet-only; it does not link to EDR/HDR/NDR InfiniBand fabrics.
NOT the crypto-enabled MCX623106AC-CDAT. The AN variant ships without IPsec/TLS inline crypto acceleration and without Secure Boot.
NOT a 200GbE card. Each QSFP56 port operates at up to 100GbE; 200GbE per port requires the ConnectX-6 (non-Dx) or newer 200G-class cards.
NOT an OSFP or SFP28 device. The cages are QSFP56 (backward-compatible with QSFP28 cabling at 100G NRZ rates).
NOT a BlueField DPU. No ARM cores; this is a SmartNIC, not a DPU.
NOT a generic NVIDIA retail unit. This listing is the Oracle OEM P/N 8205505; firmware and support follow Oracle channels.
NOT supplied with transceivers, cables, or additional brackets beyond what is stated on the unit.

Compatibility & Hard Constraints

Typical switch platforms: NVIDIA Spectrum-2 / Spectrum-3 100GbE switch environments; other 100GbE switches subject to validation.
Cabling: QSFP56 DAC/AOC at 100G PAM4 rates, and QSFP28 DAC, AOC, and optics at 100G NRZ rates, subject to cable and switch support.
Drivers: NVIDIA MLNX_OFED / DOCA host stack (Linux), in-box mlx5_core (upstream Linux), WinOF-2 (Windows), nmlx5 (VMware ESXi).
Slot requirement: PCIe 4.0 x16 for full bandwidth; operates in PCIe 3.0 x16 with reduced aggregate host bandwidth.
Pre-deployment verification: confirm firmware version, driver version, link-speed configuration, and bracket type against your chassis before deployment.

Frequently Asked Questions (FAQ)
Q. What is the Oracle 8205505?
The Oracle 8205505 is the Oracle OEM variant of the NVIDIA Mellanox MCX623106AN-CDAT ConnectX-6 Dx EN adapter: dual-port QSFP56, up to 100GbE per port, PCIe 4.0 x16, without crypto acceleration (AN variant). Oracle P/N stated per unit label.
Q. Is the Oracle 8205505 the same card as the NVIDIA MCX623106AN-CDAT?
It uses the same ConnectX-6 Dx silicon and dual QSFP56 port layout as the MCX623106AN-CDAT. As an Oracle OEM part it may carry Oracle-specific firmware branding, and firmware updates are typically handled through Oracle support channels. Verify the exact base model against the unit label.
Q. Does the 8205505 / MCX623106AN-CDAT support InfiniBand?
No. ConnectX-6 Dx EN cards are Ethernet-only. For InfiniBand at 100Gb/s, a VPI card such as the ConnectX-5 or ConnectX-6 VPI family is required.
Q. What connectors does it use - can I use QSFP28 100G cables?
The two cages are QSFP56. QSFP28 DAC, AOC, and optical modules for 100GbE NRZ operation are generally supported, subject to cable and switch validation. SFP28 and OSFP modules do not fit.
Q. Does the AN variant support IPsec/TLS inline crypto?
No. The MCX623106AN-CDAT is the crypto-disabled variant without Secure Boot. Inline IPsec/TLS crypto acceleration requires the MCX623106AC-CDAT (crypto-enabled) variant.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished. Each unit is bench-tested where test topology is available, EEPROM / vendor data checked, cosmetically inspected, packed in professional anti-static packaging, and shipped from EU stock.
Why T.E.S IT-SOLUTIONS
Every Oracle 8205505 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. Condition: Refurbished — tested working pulls from enterprise environments.