Dual 25Gb/s SFP28 Fiber Port Intelligent RDMA Ethernet Adapter for Virtualiza... For Sale

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Dual 25Gb/s SFP28 Fiber Port Intelligent RDMA Ethernet Adapter for Virtualiza...:
$114.88
CX4121A is a dual 25GbE SFP28 fiber-ports intelligent RDMA Ethernet adapter, designed for seamless networking, clustering and storage applications. Built to the PCI Express Gen 3.0 standard with a PCIE x8 bus interface, it delivers a total bandwidth of 64Gb/s, ensuring both SFP28 fiber ports achieve 25GbE throughput simultaneously. Powered by the high-performance Mellanox ConnectX-4 Lx EN MT27711A0 intelligent converged Ethernet controller, it provides a cost-effective and flexible Ethernet solution for Web 2.0, cloud, data analytics, database and storage platforms. It supports I/O virtualization via ConnectX-4 Lx EN SR-IOV technology, offering dedicated adapter resources with guaranteed isolation and protection for virtual machines, helping data center administrators improve server utilization efficiency. It supports overlay networks through advanced hardware offloading engines for NVGRE, VXLAN and GENEVE, allowing data center operators to achieve native performance in modern network architectures. Additionally, it supports RDMA over Converged Ethernet (RoCE), delivering efficient low-latency, high-performance RDMA services over Layer 2 and Layer 3 networks, which greatly enhances the performance of storage applications.
Ethernet Specifications:
Supports IEEE 802.3by, 25 Gb/s; IEEE 802.3ae 10Gb/s; IEEE 802.3az Energy Efficient Ethernet; IEEE 802.3ap; IEEE 802.3ad; 802.1AX; IEEE 802.1Q.
802.1P VLAN tags and priority; IEEE 802.1Qaz; IEEE 802.1Qbb; IEEE 802.1Qbg; IEEE 1588V2; Support Jumbo frame (9.6KB) .
Systems:
Support plug and play on Windows 11, 10 64bit and Windows Server 2012, 2012R2, 2016, 2019, 2022, 2025 64bit.
with RHEL, CentOS, FreeBSD, VMware and other Linux kernel systems.
Package List: 1X CX4121A 1X Low Profile Bracket.
1. CX4121A is a dual 25GbE SFP28 fiber port intelligent RDMA Ethernet adapter with a PCIE Gen 3.0 x8 interface. Based on the Mellanox ConnectX-4 Lx EN MT27711A0 converged Ethernet controller, it provides a cost-effective and flexible Ethernet solution for Web 2.0, cloud, data analytics, database, and storage platforms.
2. Ethernet Controller: Mellanox ConnectX-4 Lx EN MT27711A0;Bus Interface: PCIE 3.0 x8; Ethernet Speed: 2x 25GbE; Connector Type: 2x SFP28 Fiber Ports; Remote Boot: RoCE, PXE, iSCSI; Supports RDMA over RoCE; Support I/O Virtualization and SR-IOV; Support Overlay Networks by providing advanced NVGRE, VXLAN and GENEVE.
3. Supports IEEE 802.3by, 25 Gb/s; IEEE 802.3ae 10Gb/s; IEEE 802.3az Energy Efficient Ethernet; IEEE 802.3ap; IEEE 802.3ad; 802.1AX; IEEE 802.1Q; 802.1P VLAN tags and priority; IEEE 802.1Qaz; IEEE 802.1Qbb; IEEE 802.1Qbg; IEEE 1588V2; Support Jumbo frame (9.6KB).
4. PCIE Gen 3.0 Standard, 8Gb/s Per Lane. PCIE x8 Interface, 64Gb/s Bandwidth Totally, Ensure 2x SFP28 Fiber Ports archive 25GbE simultaneously. Auto-negotiates to PCIE X8, X4 Lane. Auto-switch to PCIE Gen 3.0, Gen 2.0. Support MSI/MSI-X mechanisms.
5. Support plug and play on Windows 11, 10 64bit and Windows Server 2012, 2012R2, 2016, 2019, 2022, 2025 64bit. with RHEL, CentOS, FreeBSD, VMware and other Linux kernel-based systems.
6. Support Open Fabrics Enterprise Distribution (OFED) and Open Fabrics Windows Distribution (WinOF-2). Will with SFP28 transceivers, SFP28 DAC cables and SFP28 AOC cables with PAM4 ethernet links.
7. ATTENTION: The CX4121A serves as a drop-in alternative to the MCX4121A-ACAT for server applications.
Related Items:

CX94X Dell Broadcom 57414 25GB/s Dual-Port PCIe x8 Network Adapter Card 0CX94X
$47.00

BROADCOM BCM 957414A Dual-port 25Gb/s Sfp28 Pcie Ethernet Card BCM57414
$69.88

Dual 25Gb/s SFP28 Fiber Port Intelligent RDMA Ethernet Adapter for Virtualiza...
$117.09