817753-B21 - HP NIC 640SFP28 10/25GbE 2-Port PCI-E-3.0x8 Ethernet Controller (Mellanox ConnectX-4 Lx)
Features
More Efficient and Faster Way to Send Data with RDMA Over Converged Ethernet (RoCE)
The HPE Ethernet 10/25Gb 2-port SFP28 CX4121B Adapter bypasses the TCP/IP stack and removes a data copy step reducing overall latency to deliver accelerated performance for applications such as Microsoft® Hyper-V® Live Migration, Microsoft SQL® and Microsoft SharePoint with SMB Direct.
Reduces the impact of overlay networking on host performance with tunnel offload support.
Auto negotiates to 10GbE for immediate future proofing.
Lower Latency and Higher Throughput With Messaging Accelerator (VMA)
The HPE Ethernet 10/25Gb 2-port SFP28 CX4121B Adapter reduces system latency for improved performance specifically for high-frequency trading operations while maintaining high message rates and hundreds of simultaneous connections.
Contains VMA, an included firmware with many benefits such as lower latency, higher throughput, improved CPU utilization and minimal buffer copies between user data and hardware.
Specifications
Technical Specifications
| Data rate | 25Gb |
|---|---|
| Number of ports | 2-port |
| Bus type | PCIe Gen3 x8 |
| Detailed product description | HPE 2-port, 10/25GbE 640SFP28 adapter |
| Brand | HP |
|---|---|
| Product Type | Networking > Network Cards |
| Weight | 0.27 kg |
| Warranty |
|---|
Note:
Warranty period is as stated above unless the manufacturer has chosen to specify a longer period.
All warranties are return to base unless otherwise specified.
Shipping Information
- Free NZ-wide shipping on orders over $299
- Standard delivery 2–5 business days
- Rural delivery may take an additional 1–2 days
- Same-day dispatch for orders placed before 2pm (weekdays)
Returns Policy
- 7-day returns on unused items in original packaging
- Faulty or damaged products covered under warranty
- Contact our support team to initiate a return








