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Broadcom single-port 400G QSFP-DD network card with PCIe 5.0 x16 OCP 3.0 bracket

Broadcom

Broadcom BCM957608-N1400GDP00 400G single-port QSFP-DD 112 PCIe 5.0 x16 OCP 3.0 network card

SKU CH-9XRT-FDT20 MPN BCM957608-N1400GDP00

Single-port 400G QSFP-DD 112 OCP 3.0 adapter with PCIe 5.0 x16, multi-speed 400/200/100/50/25G and 4th-gen RoCE hardware congestion control

  • Rated speed400/200/100/50/25G
  • Connection types1 x QSFP-DD 112
  • Key featuresNETWORK INTERFACE 8 SerDes capable of 100/50G PAM4 and 25G N
  • Product weight138g

Model N1400GD

Connector QSFP112-DD

Speed 1x400G

  • Line-rate 400 Gb/s throughput on a single QSFP-DD 112 port
  • Multi-speed flexibility from 25 G to 400 G auto-negotiated per link
  • Fourth-generation RoCE with hardware congestion control cuts RDMA latency
  • PCIe 5.0 x16 host interface delivers 16 lanes of high-bandwidth I/O
  • Secure boot and silicon root-of-trust anchor OCP 3.0 platform security

400G single-port QSFP-DD 112 adapter

The Broadcom BCM957608-N1400GDP00 is a single-port 400G Ethernet adapter built on a scalable controller architecture. It fits an OCP 3.0 slot and connects through a PCIe 5.0 x16 host interface. The card supports 400, 200, 100, 50 and 25G speeds on one QSFP-DD 112 connector.

Upgrade from lower-speed or older-form-factor NICs

This adapter replaces 100G or 200G single-port cards when clusters need line-rate 400G throughput with multi-speed flexibility. The jump is worth it when workloads demand fourth-generation RoCE with hardware congestion control and secure boot anchored in a silicon root of trust.

AI/ML, HPC and NVMe disaggregation clusters

It suits builders deploying AI training fabrics, high-performance computing clusters or NVMe storage disaggregation where 400G density and OCP 3.0 compliance are required. Buyers who need multi-port density or a different form factor should look at other adapter designs.

How it compares

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

Price $1,599.99
Pricier than about 92% of the 1,505 comparable items (median $90.99).

Specifications

Product
Brand nameBroadcom
Model nameN1400G
Part numberBCM957608-N1400GDP00
Performance
Rated speed400/200/100/50/25G
Ports & slots
Connection types1 x QSFP-DD 112
Size & build
Product weight138g
Shipping weight0.23 kg
Package size76 × 51 × 25 mm

Other versions of this model

4 more in the same range

Questions about this item

Does the 16-lane PCIe 5.0 x16 edge connector fit a standard OCP 3.0 slot?

Yes, the card is built to the OCP 3.0 specification with a PCIe 5.0 x16 host interface that matches the standard OCP 3.0 slot pinout and mechanical outline.

After seating the card, must the QSFP-DD 112 transceiver be locked before tightening the retention screw?

Insert the transceiver until it clicks, then secure the cage screw; skipping the click leaves the electrical contacts unseated and causes link errors.

When should the QSFP-DD 112 module be replaced if link errors appear at 400G?

Clean the module and port first; if CRC errors persist across known-good cables at 400G, 200G, 100G, 50G or 25G speeds, replace the transceiver.

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