{"product_id":"nvidia-mellanox-connectx-4-lx-cx4121a-dual-port-sfp28-25gbe-pcie-3-0-x8-network-interface-card-nic-mcx4121a-acat","title":"Nvidia Mellanox ConnectX-4 Lx CX4121A Dual Port SFP28 25GbE PCIe 3.0 x8 Network Interface Card (NIC) MCX4121A-ACAT","description":"\u003cp\u003e\u003c!--StartFragment--\u003e\u003cmeta content=\"text\/html; charset=us-ascii\" http-equiv=\"Content-Type\"\u003e\n\u003cstyle type=\"text\/css\"\u003ea {\n    text-decoration: none;\n    color: #464feb;\n}\ntr th, tr td {\n    border: 1px solid #e6e6e6;\n}\ntr th {\n    background-color: #f5f5f5;\n}\n\u003c\/style\u003e\n\u003c\/p\u003e\n\n\u003ch2 style=\"text-align: justify;\"\u003eNvidia Mellanox ConnectX-4 Lx CX4121A Dual Port SFP28 25GbE PCIe 3.0 x8 Network Interface Card (NIC) MCX4121A-ACAT\u003c\/h2\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eThe NVIDIA Mellanox ConnectX-4 Lx (Models: \u003cstrong\u003eCX4121A \/ CX4121C\u003c\/strong\u003e, Part Number: \u003cstrong\u003eMCX4121A-ACAT\u003c\/strong\u003e) is a high-performance dual-port 25GbE Ethernet adapter designed for enterprise servers, virtualization, cloud infrastructure, software-defined storage, and high-speed networking environments. It utilizes a PCIe 3.0 x8 host interface and delivers advanced networking offload capabilities with low latency and high throughput.\u003c\/p\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eCore Specifications\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eManufacturer: NVIDIA \/ Mellanox\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSeries: ConnectX-4 Lx\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eModel: CX4121A \/ CX4121C\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003ePart Number: MCX4121A-ACAT\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eHost Interface: PCI Express 3.0 x8\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003ePort Configuration: Dual Port\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003ePort Type: 2 x SFP28\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSupported Ethernet Speeds: 1GbE, 10GbE, 25GbE\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eForm Factor: Low Profile \/ Half Height\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eNetwork Technology: Ethernet\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDevice Type: Network Interface Card (NIC)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003ePerformance Features\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eHigh-performance dual-port Ethernet adapter\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSupports 25GbE connectivity\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eLow-latency networking architecture\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eAdvanced packet processing capabilities\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eHardware acceleration for network workloads\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eOptimized for cloud and enterprise environments\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eHigh throughput for data-intensive applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eEnterprise Features\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eRoCE (RDMA over Converged Ethernet) Support\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eRoCE v1 and RoCE v2 Compatible\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSR-IOV Virtualization Support\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eVXLAN Offload Support\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eNVGRE Offload Support\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eGENEVE Offload Support\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eHardware-Based Traffic Acceleration\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eCPU Offloading Technologies\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSoftware-Defined Storage Acceleration\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eVirtual Machine Networking Optimization\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eOperating System Compatibility\u003c\/h3\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eCompatible with major enterprise operating systems including:\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eMicrosoft Windows Server\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eLinux\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eVMware ESXi\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eCitrix Hypervisor\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eFreeBSD\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003ePhysical Specifications\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eLow Profile Adapter Design\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003ePCIe 3.0 x8 Interface\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDual SFP28 Network Ports\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eEnterprise Data Center Form Factor\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\u003ch1 style=\"text-align: justify;\"\u003eCX4121A vs CX4121C\u003c\/h1\u003e\n\n\u003cp style=\"text-align: justify;\"\u003e\u003cstrong\u003eCX4121A and CX4121C are functionally the same hardware platform.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eCX4121A\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eStandard Mellanox retail designation\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eCommonly referenced in Mellanox documentation\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eAssociated with MCX4121A adapter family\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eStandard NVIDIA\/Mellanox firmware environment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eCX4121C\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eOEM designation\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eCommonly found in Dell, HPE, and other server platforms\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSame ConnectX-4 Lx controller\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSame dual SFP28 port configuration\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSame PCIe 3.0 x8 interface\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSame networking capabilities\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eShared Hardware Features\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eConnectX-4 Lx Controller\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDual 25GbE SFP28 Ports\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003ePCIe 3.0 x8 Interface\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eRoCE Support\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSR-IOV Support\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eVirtualization Offloads\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eIdentical Ethernet Performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eBecause OEM manufacturers often relabel the card, systems may identify the adapter as either \u003cstrong\u003eCX4121A\u003c\/strong\u003e, \u003cstrong\u003eCX4121C\u003c\/strong\u003e, or \u003cstrong\u003eMCX4121A\u003c\/strong\u003e depending on firmware and manufacturing origin.\u003c\/p\u003e\n\n\u003chr\u003e\n\u003ch1 style=\"text-align: justify;\"\u003eEQUIPMENT COMPATIBILITY\u003c\/h1\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eThe ConnectX-4 Lx adapter is compatible with systems featuring an available PCIe x8 or x16 slot.\u003c\/p\u003e\n\n\u003ch2 style=\"text-align: justify;\"\u003eServer Compatibility\u003c\/h2\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eDell PowerEdge\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eR630\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eR640\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eR650\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eR730\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eR740\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eR750\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eHPE ProLiant\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDL360 Series\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDL380 Series\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eOther PCIe-enabled ProLiant Servers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eLenovo ThinkSystem\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSR630\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSR650\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eOther PCIe-enabled ThinkSystem Platforms\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eCisco UCS\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eC-Series Rack Servers\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eB-Series Blade Servers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eSupermicro Servers\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eX10 Series\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eX11 Series\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eX12 Series\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003ePCIe-enabled Enterprise Platforms\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"text-align: justify;\"\u003eSwitch Compatibility\u003c\/h2\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eCompatible with:\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSFP28 Ethernet Switches\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e25GbE Infrastructure\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e10GbE Infrastructure\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e1GbE Infrastructure\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDAC Cables\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSFP28 Optical Transceivers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"text-align: justify;\"\u003eVirtualization Platforms\u003c\/h2\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eVMware vSphere\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eMicrosoft Hyper-V\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eProxmox\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eCitrix Hypervisor\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eKVM\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eOpenStack\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"text-align: justify;\"\u003eImportant Compatibility Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eRequires compatible SFP28 transceivers or DAC cables.\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eRequires an available PCIe x8 or larger slot.\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eBackward compatible with lower Ethernet speeds when supported by network infrastructure.\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eLow-profile bracket may be installed depending on system configuration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eIncluded\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e1x NVIDIA Mellanox ConnectX-4 Lx Network Adapter\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eModel: CX4121A \/ CX4121C\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003ePart Number: MCX4121A-ACAT\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eRelated Part Numbers\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eMCX4121A-ACAT\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eCX4121A\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eCX4121C\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eMCX4121A\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eConnectX-4 Lx\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eMellanox ConnectX-4 Lx Dual Port 25GbE\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eMellanox 25GbE SFP28 NIC\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Nvidia \/ Mellanox","offers":[{"title":"Default Title","offer_id":55864587583561,"sku":"MCX4121A-ACAT","price":54.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0638\/3868\/3209\/files\/7835b1e7-848f-55be-8193-a7fd4d8269d1.png?v=1785597995","url":"https:\/\/parts.theserverstore.com\/products\/nvidia-mellanox-connectx-4-lx-cx4121a-dual-port-sfp28-25gbe-pcie-3-0-x8-network-interface-card-nic-mcx4121a-acat","provider":"The Server Store Parts","version":"1.0","type":"link"}