NVIDIA Spectrum-4 SN5400 64-Port 400GbE QSFP-DD 1U Rackmount Switch

Data center switch delivering 51.2 Tb/s bidirectional switching capacity and 25.6 Bpps throughput across 64 QSFP-DD ports, engineered for AI and cloud-scale spine/super-spine deployments. The NVIDIA Spectrum-4 SN5400 combines sub-300ns cut-through latency, RoCEv2 acceleration, and GPUDirect RDMA support to eliminate bottlenecks in massive parallel computing environments.

Advantages

The SN5400's 64 ports of 400GbE provide dense, high-radix connectivity ideal for leaf-spine topologies and AI training clusters. Its programmable forwarding engine supports advanced telemetry and adaptive routing, while dual redundant hot-swappable power supplies and fans ensure continuous operation. With support for 10/25/50/100/200/400 GbE speeds, it offers investment protection and seamless migration paths.

Suitable for

• Hyperscale data centers requiring ultra-low latency and high bandwidth
• AI/ML training and inference clusters leveraging GPUDirect RDMA
• Cloud service providers building multi-tenant virtualized networks
• High-performance computing (HPC) environments demanding lossless Ethernet
• Enterprises consolidating storage and compute onto a single fabric

Key specifications

• 64 x 400GbE QSFP-DD ports (backward compatible with 10/25/50/100/200 GbE)
• 51.2 Tb/s bidirectional switching capacity, 25.6 Bpps throughput
• Sub-300ns port-to-port latency (cut-through)
• Intel Xeon D-1700 processor, 32GB DDR4, 128GB SSD
• Dual redundant hot-swappable AC/HVDC/LVDC power supplies (max 1200W)
• Front-to-rear or rear-to-front airflow options
• Supports Cumulus Linux and ONIE for open network management
• Advanced features: SR-IOV, RoCEv2, VXLAN, NVGRE, MPLS, QoS, jumbo frames up to 9216 bytes
• Management: 1x RJ45 1GbE, 1x USB 3.0, 1x RJ45 console
• Security: Secure Boot, Hardware Root of Trust

Recommendations

For AI-driven data centers that cannot tolerate latency or packet loss, the SN5400 is the definitive choice. Its combination of extreme bandwidth, deterministic performance, and open software ecosystem makes it a future-proof foundation for next-generation workloads.