The HPE Ethernet 10/25Gb 2-port 640SFP28 Network Adapter (Spare Part Number: 840140-001 / Assembly Part Number: 817751-001 / Mellanox Model: MCX4121A-ACUT) is a high-performance, low-latency PCI Express network interface card (NIC) engineered for high-density enterprise data centers, cloud infrastructure, and virtualization platforms. Built on Mellanox ConnectX-4 Lx technology, this adapter provides dual SFP28 ports offering choice of 10 Gbps or 25 Gbps bandwidth per port, delivering up to 100 Gbps bi-directional aggregate throughput.
Designed to eliminate I/O bottlenecks in demanding server workloads, the HPE 640SFP28 adapter supports RDMA over Converged Ethernet (RoCE v1/v2), hardware-accelerated VXLAN and NVGRE tunnel offloads, and Single Root I/O Virtualization (SR-IOV). These advanced offload capabilities significantly decrease CPU utilization while dramatically reducing latency for virtualized environments like VMware vSphere, Microsoft Hyper-V, and high-frequency database applications.
Available from DataDive, your trusted technology hardware supplier in Qatar, this PCIe 3.0 x8 enterprise network card offers comprehensive boot options—including PXE, UEFI, and legacy boot—and is fully certified for seamless deployment across HPE ProLiant Gen9 and Gen10 rack and tower server platforms.
Key Features:
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High-speed dual-port 10GbE / 25GbE connectivity with up to 100 Gbps bi-directional bandwidth
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Built on Mellanox ConnectX-4 Lx architecture (MCX4121A-ACUT) for low-latency networking
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RDMA over Converged Ethernet (RoCE v1 & v2) support for efficient cloud and cluster computing
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Hardware offloading for VXLAN and NVGRE network virtualization overlays
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Advanced server virtualization features including SR-IOV, VMware NetQueue, and Microsoft VMQ
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Fits standard PCI Express 3.0 x8 expansion slots with full backwards compatibility for PCIe x4 slots
Technical Specifications:
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Brand: HPE (Hewlett Packard Enterprise)
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Model Name: HPE Ethernet 10/25Gb 2-port 640SFP28 Adapter
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Spare Part Number: 840140-001
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Assembly Part Number: 817751-001
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Option Part Number: 817753-B21
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Controller Chipset / Board Model: Mellanox ConnectX-4 Lx (MCX4121A-ACUT)
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Product Type: Internal PCIe Network Interface Card (NIC)
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Bus Interface: PCI Express 3.0 x8
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Ports & Connectors: 2 x SFP28 Cage Ports (Supports SFP28 25GbE & SFP+ 10GbE transceivers / DAC cables)
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Data Transfer Rate: 10 Gbps or 25 Gbps per port (100 Gbps total aggregate throughput)
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Networking Standards: IEEE 802.1Q, IEEE 802.3ae, IEEE 802.3az, IEEE 802.3by
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Virtualization Acceleration: SR-IOV, VMware NetQueue, Microsoft VMQ
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Network Offloads: VXLAN, NVGRE, TCP/UDP/IP Stateless Offloads, RSS, MSI-X
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Storage / Boot Protocols: PXE Boot, UEFI Boot, Legacy Remote Boot
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Jumbo Frame Support: Up to 9.6 KB
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Application / Compatibility: HPE ProLiant Rack/Tower Servers (Gen9/Gen10), Enterprise Data Centers, and 25GbE SFP28 Network Switches