RFQ
01Part-number led inquiry path
MCX4121A-XCAT can be used as the direct starting point for quotation, BOM sharing and availability discussion.
Network adapters & DPUs• MCX4121A-XCAT
NVIDIA ConnectX-4 Lx EN MCX4121A-XCAT – Dual-Port 10GbE SFP28 Adapter Card with RoCE Virtualization Offloads
Dual-port 10GbE SFP28 adapter with RoCE, SR-IOV virtualization, and VXLAN offloads. Ideal for cloud, storage, and database servers requiring low latency.
RFQ
Inquiry ready
Clear path for part number, quantity and BOM-led contact.
EN / AR
Bilingual buyer flow
Useful for procurement teams coordinating technical review across regions.
Datasheet available
The product datasheet can be downloaded directly from this page.
Fast technical snapshotDatasheet available
MCX4121A-XCAT
Product photoCMS image ready
Selected specs
PCIe 3.0 x8 (compatible with x16, x4, x2, x1; auto-negotiated)
SR-IOV: up to 256 Virtual Functions, 8 Physical Functions per port
Yes – RDMA over Converged Ethernet (RoCE)
TCP/UDP checksum offload, LSO/LRO, RSS, TSS, VLAN insertion/stripping
NC-SI over MCTP (SMBus/PCIe), BMC interface, SDN eSwitch management, SPI flash, JTAG
Not publicly specified – please confirm before ordering
IEEE 802.3ae (10GbE), 802.3az EEE, 802.1Qbb PFC, 802.1Qaz ETS, 1588v2, PCIe Gen 3.0
Note: Specifications are based on NVIDIA public documentation. Please confirm exact details with sales for your order.
Deployment fit
Cloud and Web 2.0: High-density virtualization hosts with 10GbE connectivity, requiring low overhead and high packet rates.
Follow-up path
Quote / Compatibility / Availability
Prepared for part-number led and BOM-led requests
MCX4121A-XCAT
Product photoCMS image ready
Product media
From product visual to RFQ context
When product photography is available it appears here for faster review, and a clean technical outline remains useful for early evaluation when imagery is limited.
01Product imagery when available
02Clear technical outline for fast review
03Built for specification review before inquiry
Overview
Product overview
The NVIDIA ConnectX-4 Lx EN MCX4121A-XCAT is a dual-port 10GbE Ethernet adapter card designed for data centers that demand high throughput, sub-microsecond latency, and efficient server utilization. Built on the proven ConnectX-4 Lx architecture, this adapter supports 10GbE and 1GbE speeds, making it a flexible solution for enterprise and cloud environments. It offloads transport operations, overlay network encapsulation (VXLAN, NVGRE), and provides hardware-based I/O virtualization (SR-IOV). The MCX4121A-XCAT includes RoCE (RDMA over Converged Ethernet) for low-latency memory access, PeerDirect for GPU communication acceleration, and comprehensive management interfaces including NC-SI for BMC integration.
Key features
- Two SFP28 ports supporting 10GbE and 1GbE speeds. Interoperable with standard Ethernet switches.
- Low-latency, high-performance RDMA services over Layer 2 and Layer 3 networks.
- SR-IOV supports up to 256 Virtual Functions (VFs) and 8 Physical Functions per port for VM isolation.
- Hardware encapsulation/de-encapsulation for VXLAN, NVGRE, and GENEVE – preserving native performance.
- TCP/UDP stateless offloads, LSO/LRO, checksum offload, RSS/TSS, and intelligent interrupt coalescence.
- NC-SI over MCTP (SMBus/PCIe) for BMC integration, remote boot over iSCSI, PXE, and UEFI.
Typical applications
- Cloud and Web 2.0: High-density virtualization hosts with 10GbE connectivity, requiring low overhead and high packet rates.
- iSCSI, NVMe-oF, and SMB Direct over RoCE for high-performance block/file access.
- Low-latency RDMA accelerates distributed databases (e.g., Cassandra, MongoDB) and big data frameworks.
- PeerDirect enables direct GPU-to-GPU communication without CPU involvement, ideal for AI training.
Buying flow
How this product review turns into a real inquiry
This section gives buyers a practical handoff from technical review into quotation or compatibility follow-up.
01
Identify the exact target model
Start from MCX4121A-XCAT or the product name to reduce ambiguity before quotation starts.
02
Add quantity or deployment context
Share quantity, destination or BOM context so the commercial follow-up is aligned with the project scope.
03
Move into availability and fit review
Use the page as the handoff point for stock discussion, compatibility checks and delivery planning.
Technical snapshot
- PCIe 3.0 x8 (compatible with x16, x4, x2, x1; auto-negotiated)
- SR-IOV: up to 256 Virtual Functions, 8 Physical Functions per port
- Yes – RDMA over Converged Ethernet (RoCE)
- TCP/UDP checksum offload, LSO/LRO, RSS, TSS, VLAN insertion/stripping
- NC-SI over MCTP (SMBus/PCIe), BMC interface, SDN eSwitch management, SPI flash, JTAG
- Not publicly specified – please confirm before ordering
- IEEE 802.3ae (10GbE), 802.3az EEE, 802.1Qbb PFC, 802.1Qaz ETS, 1588v2, PCIe Gen 3.0
- Note: Specifications are based on NVIDIA public documentation. Please confirm exact details with sales for your order.
Trust signals
Why buyers use this page to review MCX4121A-XCAT
The page is designed to reduce the distance between specification review and a real commercial inquiry.
Review
02Compatibility review before follow-up
The NVIDIA ConnectX-4 Lx EN MCX4121A-XCAT – Dual-Port 10GbE SFP28 Adapter Card with RoCE Virtualization Offloads page is positioned to support compatibility questions and project-fit review before commercial action is finalized.
Project
03Project and quantity alignment
This model can be framed against use cases such as Cloud and Web 2.0: High-density virtualization hosts with 10GbE connectivity, requiring low overhead and high packet rates. together with quantity and rollout timing.
Language
04English and Arabic follow-up
The bilingual route supports regional buying teams that need technical review and RFQ handling in two languages.
FAQ
Frequently asked questions about MCX4121A-XCAT
Short answers that give buyers clearer expectations before they move into the quote form.
Can I request a quote for MCX4121A-XCAT directly from this page?01
Yes. This page is designed to move MCX4121A-XCAT review directly into quotation, availability or BOM discussion.
Does MCX4121A-XCAT support compatibility discussion before purchase?02
Yes. The page can be used to frame compatibility questions around Cloud and Web 2.0: High-density virtualization hosts with 10GbE connectivity, requiring low overhead and high packet rates. before commercial follow-up.
Can MCX4121A-XCAT be compared with nearby models in the same family?03
Yes. Related products within the same category give buyers an internal comparison path before they submit an inquiry.
Can I send quantity or a BOM list with the inquiry?04
Yes. The inquiry path is designed to accept part numbers, quantity, BOM context and availability requirements in one submission.
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MCX4121A-XCAT
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