---
product_id: 311610531
title: "MellanoxConnectX-4 Lx EN Network Adapter (MCX4121A-XCAT)"
brand: "mellanox"
price: "2175 kr"
currency: DKK
in_stock: true
url: https://www.desertcart.dk/products/311610531-mellanoxconnectx-4-lx-en-network-adapter-mcx4121a-xcat
store_origin: DK
region: Denmark
---

# Low latency Multi-host tech High throughput MellanoxConnectX-4 Lx EN Network Adapter (MCX4121A-XCAT)

**Brand:** mellanox
**Price:** 2175 kr
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate Your Network Game!

## Quick Answers

- **What is this?** MellanoxConnectX-4 Lx EN Network Adapter (MCX4121A-XCAT) by mellanox
- **How much does it cost?** 2175 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/311610531-mellanoxconnectx-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

- • **Maximize Your ROI:** Leverage multi-host technology to enhance your data center's return on investment.
- • **Compact Powerhouse:** Lightweight design (155g) with robust performance, perfect for modern data centers.
- • **Virtualization Ready:** Cutting-edge performance in virtualized overlay networks for optimal efficiency.
- • **Unleash Unmatched Speed:** Experience industry-leading throughput and low latency for seamless web access and storage performance.
- • **Versatile Compatibility:** Smart interconnect for x86, Power, ARM, and GPU-based platforms ensures flexibility.

## Overview

The Mellanox ConnectX-4 Lx EN Network Adapter (MCX4121A-XCAT) is a high-performance network solution designed for data centers, offering exceptional throughput and low latency. Its multi-host technology maximizes ROI while ensuring compatibility across various computing platforms, making it ideal for virtualized environments.

## Description

MellanoxConnectX-4 Lx EN Network Adapter (MCX4121A-XCAT)

## 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 |
|---------------|-------|
| Brand | Mellanox |
| Product Dimensions | 21.21 x 16.51 x 5.84 cm; 155 g |
| Batteries | 1 Lithium Ion batteries required. |
| Item model number | MCX4121A-XCAT |
| Manufacturer | INGB9 Music Vendor Code |
| Color | black |
| Wattage | 5 |
| Hardware Platform | PC;Unix |
| Are Batteries Included | No |
| Lithium Battery Energy Content | 2 Kilowatt Hours |
| Lithium Battery Packaging | Batteries packed with equipment |
| Lithium Battery Weight | 2 Grams |
| Number Of Lithium Ion Cells | 5 |
| Number of Lithium Metal Cells | 5 |
| Item Weight | 155 g |

## Product Details

- **Brand:** Mellanox
- **Hardware interface:** PCIE x 8
- **Colour:** black
- **Compatible devices:** Desktop
- **Data link protocol:** Bluetooth

## Images

![MellanoxConnectX-4 Lx EN Network Adapter (MCX4121A-XCAT) - Image 1](https://m.media-amazon.com/images/I/612n71ocDLL.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.

## Frequently Bought Together

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

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-03-14*