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Low-profile half-length PCIe card with single QSFP112-DD port

Broadcom

Broadcom BCM957608-P1400GDF00 400G QSFP112-DD PCIe 5.0 x16 network card

SKU CH-4VJV-JM1HP MPN BCM957608-P1400GDF00

Single-port 400G QSFP112-DD PCIe 5.0 x16 NIC with RoCEv2 RDMA and TruFlow for AI, HPC and cloud workloads

  • Rated speed400/200/100/50/25GbE
  • Interface typePCIe NIC
  • Connection typesQSFP112-DD
  • Key featuresForm Factor: PCIe Low Profile Ports: 1 Host Interface: Gen 5
  • Product weight138.0g
  • 400 GbE bandwidth for AI/ML and HPC workloads
  • PCIe 5.0 x16 host interface delivers maximum throughput
  • Low-profile half-length form factor fits dense 1U/2U servers
  • Hardware RoCEv2 RDMA with congestion control cuts latency
  • NIC partitioning with 16 physical functions enables multi-tenant isolation

Single-Port 400G QSFP112-DD NIC

The Broadcom BCM957608-P1400GDF00 is a single-port 400 Gigabit Ethernet network interface card built on a scalable 400G controller architecture. It targets AI/ML training clusters, high-performance computing and hyperscale cloud deployments that demand maximum throughput per slot. The card operates at 400, 200, 100, 50 and 25 GbE speeds over a single QSFP112-DD connector. It is not suited for buyers who need multiple physical ports or lower-cost 10/25GbE connectivity.

PCIe 5.0 x16 bandwidth ceiling

The host interface is PCIe 5.0 x16, providing the lane count and signalling rate needed to sustain 400GbE line rate without host-side bottlenecks. Performance scales down through 200, 100, 50 and 25 GbE modes when connected to slower transceivers or switch ports. Systems limited to PCIe 4.0 or fewer than 16 lanes cannot deliver full 400G throughput. The card does not support multi-host operation.

Low-profile half-length form factor

A low-profile, half-length bracket allows installation in dense 1U and 2U server chassis where full-height cards will not fit. The single QSFP112-DD cage accepts direct-attach copper or optical modules up to the card's rated speeds. Hardware-accelerated RoCEv2 with congestion control, NPAR with 16 physical functions and TruFlow features are exposed through supported Linux distributions and DPDK. The board weighs 138.0g.

How it compares

Measured against everything we stock in Ethernet Cards & NICs, at today’s prices. Recalculated every night.

Price $1,616.99
Pricier than about 92% of the 1,505 comparable items (median $90.99).

Specifications

Product
Brand nameBroadcom
Model nameP1400GD
Part numberBCM957608-P1400GDF00
Performance
Rated speed400/200/100/50/25GbE
Ports & slots
Interface typePCIe NIC
Connection typesQSFP112-DD
Size & build
Product weight138.0g
Shipping weight0.91 kg
Package size25 × 25 × 25 mm

Questions about this item

Should I pick the 400G QSFP112-DD version or a lower-speed model?

The card runs at 400, 200, 100, 50 or 25 GbE on the same QSFP112-DD port, so one SKU covers every speed tier you might need today.

What does the 400GbE rating deliver inside an actual server?

PCIe 5.0 x16 provides enough host bandwidth to sustain line-rate 400 GbE with hardware-accelerated RoCEv2 RDMA, TruFlow and NPAR for AI/ML, HPC and NVMe-over-Fabrics workloads.

How does the PCIe 5.0 x16 interface limit real-world throughput?

The Gen 5 x16 host link matches the 400 GbE line rate, so the bus does not cap throughput; the QSFP112-DD connector and controller set the practical ceiling.

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