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HPE 331T low-profile PCIe adapter with four network ports

HPE

HPE 331T 647594-B21 4-port Gigabit network adapter

SKU CH-8RT4-V5Q5W

A PCIe 2.0 x4 low-profile adapter adds four Gigabit Ethernet ports for ProLiant DL20 Gen9, DL560 Gen9, ML10 Gen9, ML10 v2, ML110 Gen9, ML30 Gen9 and XL170r Gen9 servers

  • Four Gigabit Ethernet ports maximise I/O density in a single PCIe slot
  • PCIe 2.0 x4 low-profile design fits space-constrained servers
  • Virtualization offloads VMQ and NetQueue reduce CPU load
  • Large Send, TCP checksum and VLAN tagging accelerate network throughput
  • IEEE 1588 support enables precise time synchronisation

Four-port Gigabit Ethernet adapter

The HPE 331T is a low-profile PCIe 2.0 x4 network adapter that provides four Gigabit Ethernet ports. It is designed for compatible HPE ProLiant servers including DL20 Gen9, DL560 Gen9, ML10 Gen9, ML10 v2, ML110 Gen9, ML30 Gen9, and XL170r Gen9. The single-chip design reduces power consumption while optimising I/O slot utilisation.

Replaces single or dual-port 1GbE cards

This adapter consolidates four ports into one slot, making the jump worthwhile when you need higher port density for virtualization, network segmentation, or server consolidation without consuming additional PCIe slots. It delivers full line-rate performance across all ports with an aggregate throughput of 8 Gb.

Suits administrators needing port density

It supports Large Send and Receive offload, TCP checksum and segmentation, VLAN tagging, MSI-X, jumbo frames, IEEE 1588, VMware NetQueue, and Microsoft VMQ. Buyers who need 10GbE or faster connectivity, fibre interfaces, or a different form factor should look elsewhere.

Highlights

  • Four Gigabit Ethernet ports maximise I/O density in a single PCIe slot
  • PCIe 2.0 x4 low-profile design fits space-constrained servers
  • Virtualization offloads VMQ and NetQueue reduce CPU load
  • Large Send, TCP checksum and VLAN tagging accelerate network throughput
  • IEEE 1588 support enables precise time synchronisation

Specifications

BrandHewlett-Packard
Model647594-B21

Questions about this item

Does the low-profile PCIe 2.0 x4 bracket fit the ProLiant DL20 Gen9 chassis?

Yes, the 331T adapter is built for low-profile PCIe 2.0 x4 slots in ProLiant DL20 Gen9, DL560 Gen9, ML10 Gen9, ML10 v2, ML110 Gen9, ML30 Gen9 and XL170r Gen9 servers.

Which driver step is often missed when installing the 331T on VMware ESXi?

After seating the card in the PCIe 2.0 x4 slot, install the VMware NetQueue-enabled driver before creating vSwitches so all four Gigabit ports expose queue pairs to the hypervisor.

When should the firmware on the 331T be updated?

Apply a firmware update when adding the adapter to a ProLiant DL560 Gen9 or ML30 Gen9 cluster that runs HPE Sea of Sensors 3D Technology, so IEEE 1588 timestamping and MSI-X interrupt handling stay aligned with the system BIOS.

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