HPE InfiniBand XDR400 / 400GbE Dual-Port QSFP112 PCIe 6 CX8 Crypto Adapter — P79115-H21

The HPE P79115-H21 is a dual-port InfiniBand XDR400 / 400GbE QSFP112 adapter based on the ConnectX-8 (CX8) chipset with hardware crypto offload, in a half-height half-length (HHHL) PCIe Gen 6 x16 form factor. Designed for next-generation HPC, AI, and data center workloads, it delivers 400Gb/s per port over XDR400 InfiniBand or 400GbE Ethernet with built-in cryptographic acceleration.

Key Features

• Dual-port QSFP112 at 400Gbps per port — XDR400 InfiniBand or 400GbE Ethernet
• ConnectX-8 (CX8) chipset — next-generation HPE InfiniBand/Ethernet fabric adapter
• PCIe Gen 6 x16 host interface for maximum bandwidth on Gen11 and future platforms
• Hardware crypto offload (Crypto) for encrypted fabric communication without CPU overhead

Product Specifications

• Part Number: P79115-H21
• Manufacturer: HPE
• Ports: 2x QSFP112
• Speed: 400Gbps per port (800Gbps aggregate)
• Chipset: ConnectX-8 (CX8)
• Host Interface: PCIe Gen 6 x16
• Form Factor: HHHL (Half-Height Half-Length)
• Crypto: Hardware crypto offload enabled

Interface Specifications

• Host Interface: PCI Express Gen 6 x16
• Fabric Protocol: InfiniBand XDR400 or 400GbE Ethernet (adaptive)
• Port Type: 2x QSFP112
• Cable Support: QSFP112 DAC, AOC, and optical transceivers for 400Gb/s connectivity

Network & Protocol Specifications

• InfiniBand Standard: XDR400 (Extended Data Rate 400 — 400Gb/s per port)
• Ethernet Mode: 400GbE (IEEE 802.3bs)
• RDMA: RDMA over InfiniBand and RoCEv2 over Ethernet
• Crypto Offload: Hardware-accelerated encryption/decryption for in-flight data security

Use Cases

• Next-generation HPC cluster interconnect at 400Gbps XDR400 InfiniBand per port
• Large-scale AI/ML distributed training requiring maximum fabric bandwidth per node
• 400GbE data center networking for storage, compute, and east-west traffic
• Encrypted fabric workloads leveraging hardware crypto offload for compliance

Compatibility

• HPE ProLiant Gen11 and next-generation platforms with PCIe Gen 6 x16 slots
• Compatible with NVIDIA/Mellanox InfiniBand XDR400 switches and 400GbE Ethernet fabric
• QSFP112 cabling ecosystem for 400Gb/s InfiniBand and Ethernet interconnects

Frequently Asked Questions

What is InfiniBand XDR400 and how does it compare to HDR and NDR?

XDR400 (Extended Data Rate 400) delivers 400Gbps per port — double NDR (200Gbps) and four times HDR (100Gbps). XDR400 is the latest generation, suited for the most demanding AI and HPC workloads requiring maximum per-port bandwidth.

What does the CX8 Crypto designation mean?

CX8 refers to the NVIDIA ConnectX-8 chipset. The Crypto designation indicates hardware-accelerated encryption is enabled on this adapter variant, supporting encrypted InfiniBand or Ethernet fabric communication without host CPU involvement.

Can P79115-H21 operate in PCIe Gen 5 or Gen 4 slots?

PCIe Gen 6 cards are backward compatible with PCIe Gen 5 and Gen 4 slots but will operate at reduced bandwidth. For full XDR400 performance, a PCIe Gen 6-capable platform is required.

The HPE P79115-H21 dual-port XDR400 InfiniBand / 400GbE CX8 Crypto adapter delivers next-generation fabric bandwidth for HPE AI and HPC infrastructure. Order today — in stock at a competitive price.