NVIDIA’s ConnectX‑6 Dx family offers three 100GbE SmartNIC models that share the same hardware platform and networking performance. The key differences lie only in security features: Secure Boot and hardware cryptographic acceleration.
Common Specifications (all three models)
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Dual‑port 100GbE QSFP56
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PCIe Gen4 x16 host interface
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Supports 1/10/25/40/50/100GbE speeds
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RoCE, SR‑IOV, storage acceleration, stateless offloads
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Power ~19W, operating temp 0–55°C
Model‑specific security features
| Model | Secure Boot | Crypto Acceleration |
|---|---|---|
| MCX623106AN‑CDAT | No | No |
| MCX623106AS‑CDAT | Yes | No |
| MCX623106AC‑CDAT | Yes | Yes |
Which one to choose?
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MCX623106AN‑CDAT– For standard enterprise networks where extra security is not required.
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MCX623106AS‑CDAT– For environments that demand authenticated firmware loading (compliance/security policies).
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MCX623106AC‑CDAT – For workloads with heavy encryption (IPsec, multi‑tenant clouds, finance) – offloads crypto from the CPU and includes Secure Boot.
Bottom line
All three deliver identical network performance. Your choice should be based solely on security and compliance needs, not on speed or latency.
