HPE Ethernet 10/25Gb 2-port SFP28 MCX4121A-ACUT Internal Network Interface Card

Network traffic bottlenecks can cripple your data centre, especially when you’re still stuck at 10 Gbps. The HPE Ethernet 10/25Gb 2-port SFP28 MCX4121A-ACUT Internal Network Interface Card gives you a fast, reliable way to move data at up to 25 Gbps, ideal for virtualised workloads, high-frequency trading and video-intensive applications. It fits into select HPE ProLiant Gen9 and Apollo servers, delivering the bandwidth you need without costly upgrades.

Usages of a 25Gbps Network Interface Card

You can install this card in a standard low-profile PCIe slot and immediately benefit from higher throughput for tasks such as Microsoft Hyper-V live migration, SQL database replication, or any workload that relies on low-latency, high-speed Ethernet. It works seamlessly with VMware ESXi, Windows Server and major Linux distributions, making it a versatile upgrade for any busy server environment.

Benefits of HPE Network Interface Card

• Faster data movement: Enjoy up to 25 Gbps per port, cutting transfer times dramatically.
• Lower latency: RoCE and VMA offload reduce CPU overhead and speed up real-time applications.
• Future-proof connectivity: Auto-negotiates to 10 GbE, protecting your investment as needs evolve.
• Broad OS support: Compatible with VMware, Windows, Linux and Solaris, so you stay flexible.
• Efficient power use: Designed for low-profile servers, it adds performance without a large power draw.

Why Choose HPE Network Interface Card

Choosing this HPE adapter means you get a purpose-built solution that matches the performance demands of modern enterprises. The dual-port SFP28 design gives you redundant, high-speed paths, ensuring continuous service even during maintenance or unexpected spikes. With built-in support for VLANs, QoS, jumbo frames and advanced offloading, the card handles complex traffic patterns while keeping CPU cycles free for your core applications.

Unlike generic adapters, this HPE card integrates tightly with the server’s firmware and management tools, simplifying deployment and monitoring. The combination of RoCE, VMA and tunnel offload means you can run demanding workloads-such as high-frequency trading or large-scale virtual desktop infrastructure-without the usual network-induced delays.

Key Features of a 25Gbps Network Interface Card

• Ports: 2 × 25 Gigabit Ethernet SFP28. Provides two high-speed connections for redundancy or increased bandwidth.
• Data rate: 25 Gbps. Delivers fast transfer speeds for data-intensive applications.
• Bus type: PCI Express 3.0 x8 / PCI Express 3.0 x4. Ensures the card can fit a range of server configurations.
• RoCE support: Enables direct memory access over Ethernet, cutting latency for storage and compute traffic.
• VMA firmware: Lowers latency and improves CPU utilisation by handling buffer copies in hardware.
• Offloading: TCP/IP, UDP/IP, checksum and segmentation offload reduce processor load during heavy traffic.
• Compatibility: Works with VMware ESXi 6.0, Windows Server 2012 R2, multiple Linux distributions and Solaris 11.1.
• Form factor: Low-profile plug-in card. Fits easily into space-constrained server chassis.
• Standards: Meets IEEE 802.1Q, 802.3ae, 802.3az and other key Ethernet specifications for reliable operation.
• Certification: FCC Class A, RoHS and multiple international compliance marks guarantee safe, regulated performance.

Specifications