HPE 647594-B21 Ethernet 1Gb 4-Port 331T Adapter

• Brand: HPE
• Product Type: Ethernet server adapter / network interface card
• Product Family: HPE Ethernet 331T
• Model: 331T
• Option Part Number: 647594-B21
• Spare Part Reference: 649871-001 
• Ethernet Speed: 1GbE
• Port Count: 4
• Port Type: RJ-45
• Network Interface: 10/100/1000Base-T
• Port Data Rate: Up to 1Gb/s per port
• Aggregate Full-Duplex Theoretical Bandwidth: 8Gb/s per adapter
• Host Interface: PCI Express
• PCIe Generation PCIe: 2.0
• PCIe Datapath: x4
• PCIe Slot Compatibility: x4; compatible larger PCIe slots may accept the x4 card, subject to server design
• Form Factor: Stand-up PCIe adapter
• Low-Profile Support: Yes
• Bracket Configuration: Low-profile and full-height brackets
• Controller Architecture: Single-chip Broadcom BCM5719
• Network Offloads: Large Send Offload; Large Receive Offload; TCP checksum/segmentation
• VLAN Support: VLAN tagging
• Jumbo Frames: Supported
• MSI/MSI-X: Supported
• IEEE 1588: Supported
• Energy Efficient Ethernet: Supported
• PXE: Supported
• Intended Platform: HPE server infrastructure
• Compatibility: Supported HPE server models; verify exact server/riser configuration
• Primary Deployment: Server networking, virtualization, segmentation and consolidation

Why Choose This Product?

• Four ports from one adapter - Increases 1GbE port density while using a single PCIe expansion position.
• Established 10/100/1000Base-T connectivity - Fits conventional copper Ethernet infrastructure without requiring SFP-based networking.
• BCM5719 controller - Gives IT teams a clearly identified hardware platform for compatibility and lifecycle planning.
• Low-profile flexibility - Supports installations where server expansion space requires a low-profile adapter configuration.
• Virtualization-ready features - NetQueue and VMQ support make the adapter relevant to virtualized server environments. 
• Network segmentation potential - Four physical Ethernet ports provide additional options for separating network traffic by role or architecture.
• Efficient slot utilization - A quad-port design can deliver more 1GbE connectivity per occupied expansion slot than lower-port-count adapters.
• Procurement precision - The exact 647594-B21 SKU, BCM5719 controller, four-port configuration and PCIe 2.0 x4 interface give buyers concrete specifications to validate before ordering.