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Mellanox ConnectX-2 VPI network card with QSFP and SFP+ ports

Mellanox Technologies

Mellanox Technologies MHZH29-XTR 40Gb QSFP 10GbE SFP+ PCIe 2.0 network card

SKU CH-96NF-ZR83R MPN MHZH29-XTR

Dual-port ConnectX-2 VPI adapter delivers 40 Gb/s QSFP and 10 Gb/s SFP+ over PCIe 2.0 for InfiniBand or Ethernet clusters

  • Rated speed40GBS QSFP 10GIGE SFP+
  • Interface typePCI Express 2.0
  • Key featuresConnectX-2 adapter card with Virtual Protocol Interconnect (
  • 40 Gbps QSFP bandwidth for high-throughput data centres
  • 10 GbE SFP+ ports for flexible Ethernet connectivity
  • PCI Express 2.0 interface for broad server compatibility
  • ConnectX-2 VPI supports both InfiniBand and Ethernet protocols
  • Single adapter consolidates cabling in virtualised environments

Enterprise dual-protocol adapter

The Mellanox MHZH29-XTR is a ConnectX-2 VPI network card built for enterprise data centres and high-performance computing clusters. It delivers both InfiniBand and Ethernet connectivity from a single PCIe 2.0 slot, targeting workloads that demand low latency and protocol flexibility.

PCIe 2.0 bandwidth ceiling

The card operates on a PCI Express 2.0 interface, which limits total throughput to the bandwidth available on that generation. While the ports support 40 Gb/s QSFP and 10 Gb/s SFP+ signalling, the host bus can become the bottleneck for sustained bidirectional traffic at line rate.

QSFP and SFP+ cage layout

Two different cage types sit on the bracket, so direct-attach copper or optical modules must match each port exactly. The low-profile bracket fits standard server chassis, but the mixed connector arrangement means cable management must account for differing module lengths and latch styles.

How it compares

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

Price $637.99
Pricier than about 90% of the 1,505 comparable items (median $90.99).

Specifications

Product
Brand nameMellanox
Model nameMHZH29-XTR
Performance
Rated speed40GBS QSFP 10GIGE SFP+
Ports & slots
Interface typePCI Express 2.0
Size & build
Shipping weight0.45 kg
Package size203 × 152 × 13 mm

Questions about this item

Should I use the 40 Gb QSFP port or the 10 Gb SFP+ port for my link?

Choose the 40 Gb QSFP port for InfiniBand or 40 Gb Ethernet links, and the 10 Gb SFP+ port for standard 10 Gb Ethernet connections.

What throughput can I expect from the 40 Gb QSFP port on a PCIe 2.0 slot?

The 40 Gb QSFP port runs at line rate, but the PCIe 2.0 x8 host interface caps sustained throughput at the bus limit.

Does the PCIe 2.0 interface restrict the 40 Gb QSFP or 10 Gb SFP+ speeds?

Yes, the PCIe 2.0 x8 bus sets the maximum host bandwidth, so neither port can exceed that ceiling in practice.

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