---
product_id: 90938552
title: "ConnectX-4 Lx EN Network Adapter (MCX4121A-XCAT)"
brand: "mellanox"
price: "₨131879"
currency: LKR
in_stock: true
reviews_count: 2
category: "Mellanox"
url: https://www.desertcart.lk/products/90938552-connectx-4-lx-en-network-adapter-mcx4121a-xcat
store_origin: LK
region: Sri Lanka
---

# 10 Gbps blazing throughput Multi-host tech for versatile compute Open Compute Project form factor ConnectX-4 Lx EN Network Adapter (MCX4121A-XCAT)

**Brand:** mellanox
**Price:** ₨131879
**Availability:** ✅ In Stock

## Summary

> 🚀 Connect faster, scale smarter, lead the data center revolution!

## Quick Answers

- **What is this?** ConnectX-4 Lx EN Network Adapter (MCX4121A-XCAT) by mellanox
- **How much does it cost?** ₨131879 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/90938552-connectx-4-lx-en-network-adapter-mcx4121a-xcat)

## Best For

- mellanox enthusiasts

## Why This Product

- Trusted mellanox brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **OCP 2.0 Form Factor:** Seamlessly integrates with modern data center designs for maximum efficiency and scalability.
- • **Multi-Host Technology:** Revolutionize rack architecture with shared network resources, slashing CAPEX and OPEX.
- • **Blazing 10 Gbps Throughput:** Experience ultra-fast data transfer that accelerates your web and storage performance.
- • **Virtualization-Ready Performance:** Host more VMs per server with reduced CPU load and ultra-low latency for real-time responsiveness.
- • **Cross-Platform Smart Interconnect:** Optimized for x86, Power, ARM, and GPU platforms to future-proof your infrastructure.

## Overview

The ConnectX-4 Lx EN Network Adapter (MCX4121A-XCAT) delivers industry-leading 10 Gbps Ethernet throughput with ultra-low latency, designed for Open Compute Project 2.0 environments. Featuring innovative multi-host technology, it maximizes data center ROI by enabling advanced rack designs and reducing CPU overhead in virtualized settings. Compatible across x86, Power, ARM, and GPU platforms, it’s the smart choice for next-gen high-performance networking.

## Description

With ConnectX-4 Lx EN, server and storage applications will achieve significant throughput and latency improvements resulting in faster access, real-time response and more virtual machines hosted per server. ConnectX-4 Lx EN for Open Compute Project (OCP) specification 2.0 improves network performance by increasing available bandwidth while decreasing the associated transport load on the CPU especially in virtualized server environments. Moreover, ConnectX-4 Lx EN introduces the multi-host technology, which enables a new innovative rack design that achieves maximum CAPEX and OPEX savings without compromising on network performance.

## Features

- Open compute project form factor
- Industry-leading throughput and low latency for web access and storage performance
- Maximizing data centers' return on investment (ROI) with multi-host technology
- Smart interconnect for x86, Power, ARM, and GPU-based compute and storage platform
- Cutting-edge performance in virtualized overlay networks

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B019MRAM72 |
| Best Sellers Rank | #942 in Internal Computer Networking Cards |
| Brand | Mellanox |
| Built-In Media | Mellanox network adapter |
| Color | black |
| Compatible Devices | Desktop, Laptop |
| Customer Reviews | 4.6 out of 5 stars 5 Reviews |
| Data Link Protocol | Ethernet |
| Data Transfer Rate | 10240 Megabits Per Second |
| Global Trade Identification Number | 07290107197878 |
| Hardware Interface | PCIE x 8 |
| Item Type Name | ConnectX-4 Lx EN Network Adapter |
| Item Weight | 0.24 Pounds |
| Manufacturer | INGB9 Music Vendor Code |
| Mfr Part Number | MCX4121A-XCAT |
| Model Number | MCX4121A-XCAT |
| Unit Count | 1.0 Count |
| Warranty Description | Unspecified |

## Product Details

- **Brand:** Mellanox
- **Hardware Interface:** PCIE x 8
- **Color:** black
- **Compatible Devices:** Laptop, Desktop
- **Data Link Protocol:** Ethernet
- **Data Transfer Rate:** 10240 Megabits Per Second
- **Global Trade Identification Number:** 07290107197878
- **Manufacturer:** INGB9 Music Vendor Code

## Images

![ConnectX-4 Lx EN Network Adapter (MCX4121A-XCAT) - Image 1](https://m.media-amazon.com/images/I/51C6swxuCzL.jpg)

## Questions & Answers

**Q: Does this come with half-height, full-height or both brackets?**
A: The ones I received came with both brackets.

**Q: Are the slots qsfp or sfp+?**
A: They can support 10Gbps (sfp) and 25Gbps with SFP-128 cables that I use to connect server to Synology NAS (both with this Mellanox card).  I don't believe that they support qsfp because I believe that would be 100Gbps (I believe you have to move up to the ConnectX-5 card for that).

**Q: Can this card be installed in a "generic" server or only in an OCP system?**
A: They can be installed in "generic" server if it has required slots.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by L***S on November 16, 2020*



### ⭐⭐⭐ Review
*by S***N on May 24, 2017*



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- Mellanox ConnectX-4 Lx EN Network Adapter (MCX4121A-ACAT)

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-07-07*