MCX623106AN-CDAT: NVIDIA ConnectX-6 Dx EN Dual-Port 100GbE QSFP56 PCIe 4.0 x16 Ethernet Network Adapter
Also listed as: ConnectX-6 Dx 100GbE, MCX623106AN-CDAT-SP, MCX623106AN, MCX623106AC-CDAT · made by Mellanox
The NVIDIA ConnectX-6 Dx EN dual-port 100GbE network adapter is engineered with PCIe 4.0 x16 host interconnect and integrated cryptographic hardware engines. Providing inline IPsec and TLS data-in-motion encryption at line rate without CPU performance penalties, it is widely utilized for secure multi-tenant cloud data centers and high-speed NVMe-oF SAN backbones. When purchasing used ConnectX-6 Dx cards, verify crypto enablement with flint, inspect QSFP56 cage cleanliness, and confirm proper cooling in 1U/2U server chassis.
Specifications
| Part number | MCX623106AN-CDAT |
|---|---|
| Brand | NVIDIA |
| Made by | Mellanox |
| Type | Network adapters |
| Other numbers | ConnectX-6 Dx 100GbE, MCX623106AN-CDAT-SP, MCX623106AN, MCX623106AC-CDAT |
| Status | current |
| Interface | PCIe 4.0 x16 |
| Form factor | PCIe Low Profile |
| Ports | 2x 100GbE QSFP56 |
| Speed | 100GbE |
| Generation fit | PCIe Gen4 enterprise servers |
About the MCX623106AN-CDAT
MCX623106AN-CDAT is NVIDIA's ConnectX-6 Dx EN dual-port 100GbE QSFP56 PCIe 4.0 x16 network adapter. Engineered with integrated hardware cryptographic engines, it provides inline IPsec and TLS 1.3 data encryption at line rate without CPU overhead, alongside RoCEv2 RDMA and advanced connection tracking. It represents the standard for secure cloud data centers and NVMe-oF fabrics.
Compatibility
Compatible with PCIe 4.0 x16 slots across enterprise servers from Dell, HPE, Lenovo, and Supermicro. Features dual QSFP56 cages supporting 100GbE, 50GbE, 40GbE, and 25GbE transceivers or DAC cables. Supported in Linux via the in-tree mlx5_core driver. Interchangeable brackets fit 1U and 2U chassis.
How to identify a genuine unit
Genuine cards display a label with part number MCX623106AN-CDAT and ConnectX-6 Dx branding. In lspci, it identifies as Mellanox Technologies MT2892 Family [ConnectX-6 Dx]. Flint tool confirms crypto acceleration features and active firmware certificate chains.
Buying used
Verify that cryptographic offloads are enabled and that the card does not have vendor-specific firmware locks. Inspect the QSFP56 cages for damage and ensure that server chassis cooling provides standard enterprise airflow over the card's passive heatsink.
Reference prices (last 14 days, updated 2026-10-27)
New: USD 890 (1 sighting, Oct 2026)
Used: USD 540 (1 sighting, Oct 2026)
All sightings
| Seller | Condition | Price | Note | Seen |
|---|---|---|---|---|
| serversupply.com | new | USD 890 | 2026-10-27 | |
| ebay.com | used | USD 540 | 2026-10-27 |
Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.
Fits these models
Equivalent part numbers
- Dell 540-BDCP Dell Mellanox ConnectX-6 Dx Dual Port 100GbE QSFP56 PCIe Adapter
FAQ
What security features are built into ConnectX-6 Dx?
Hardware inline IPsec and TLS 1.3 encryption/decryption at 100Gb/s wire speed.
What interface does it use?
PCI Express 4.0 x16 host interface with two QSFP56 cages.
Buying or selling MCX623106AN-CDAT?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- NVIDIA ConnectX-6 Dx Ethernet Adapter Cards User Manual, checked 2026-10-27