HPE 640SFP28 2-Port 10/25GbE Network Adapter 817753-B21

BRAND NEW. FACTORY SEALED. RETAIL BOXED. FULL HPE WARRANTY INCLUDED. AVAILABLE FROM CHICAGO COMPUTER SUPPLY. Overview As data center traffic grows, 10GbE networks become a bottleneck. 25GbE adapters provide higher bandwidth with better cost efficiency per gigabit, making them the next step for scalable infrastructure. The HPE 640SFP28 2-Port 10/25GbE Adapter (817753-B21) delivers high-performance connectivity for HPE ProLiant servers. Built on Mellanox ConnectX-4 Lx technology, it supports both 10GbE and 25GbE speeds, enabling flexible deployment in modern data centers. Key Features 2 × SFP28 ports supporting 10GbE and 25GbE Based on Mellanox ConnectX-4 Lx controller PCIe 3.0 interface for high throughput Supports RDMA over Converged Ethernet (RoCE v1/v2) Advanced offloads to reduce CPU usage Virtualization support (VXLAN, NVGRE) Jumbo frame support up to 9.6 KB Optimized for cloud, virtualization, and storage workloads Technical Specifications Brand: HPE Model: 640SFP28 Adapter Part Number: 817753-B21 Product Type: Network Adapter Device Type Ethernet Network Interface Card (NIC) Ports 2 × SFP28 (10/25GbE) Network Technology 10 Gigabit Ethernet 25 Gigabit Ethernet Data Transfer Rate Up to 25 Gbps per port Interface PCIe 3.0 x8 (also supports x4 lanes) Controller Mellanox ConnectX-4 Lx Connectivity Wired Features RDMA over Converged Ethernet (RoCE v1/v2) TCP/IP offload, TSO, LSO Receive Side Scaling (RSS) VLAN and QoS support VXLAN and NVGRE support Jumbo frames up to 9.6 KB Performance Up to 100 Gbps bidirectional throughput Application Virtualization platforms Cloud infrastructure High-speed storage networking Enterprise data centers Compatibility HPE ProLiant DL Gen9 servers HPE Apollo servers Use Cases The HPE 817753-B21 adapter is ideal for environments requiring higher bandwidth than 10GbE, such as virtualization clusters, cloud deployments, and software-defined storage. It enables faster data transfer while maintaining compatibility with existing 10GbE infrastructure. Why Choose HPE 817753-B21 Dual-port 25GbE for increased bandwidth Backward compatible with 10GbE networks Supports RDMA for low-latency workloads Optimized for virtualization and cloud environments Reduces CPU overhead with hardware offloads Built on proven Mellanox technology Scalable and cost-effective upgrade path Brand new hardware backed by a full HPE warranty FAQs What is the HPE 817753-B21 used for? It provides high-speed 10/25GbE networking for servers. How many ports does it have? It includes 2 SFP28 ports. Does it support both 10Gb and 25Gb? Yes, it supports both speeds. Is this a switch module? No. It is a server network adapter. Does it support RDMA? Yes, it supports RoCE v1 and v2. What type of cables does it use? It uses SFP28 optical modules or DAC cables.