Can a unifi SFP cable be connected to this card directly?

If you mean the copper SFP28 DAC cable, then yes. I am currently using that. For a fiber cable, you need a transceiver.

I have a qnap 873e w/qxg-10g1t add-in. will the mcx4121a-acat 25gigabit ethernet card support this using cat7? what speed could i expect?

This NIC uses SFP28 adaptor. If you use SFP+ transceiver with 10G base-T, you will get 10G speed

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

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

Product ID: 83883544

Details

Brand
Mellanox
Color
Assorted
Compatible Devices
Desktop
Data Link Protocol
Ethernet
Data Transfer Rate
25600
Global Trade Identification Number

⚡25.6 Gbps ultra-high throughput

🖧Multi-host tech for max ROI

⏱️Industry-leading low latency

€ 167.22

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Slovakia.

Secure transaction

Description

🚀 Elevate your data center game with ConnectX-4 Lx EN — where speed meets smart savings!

OCP 2 0 READY - Future-proof your infrastructure with the Open Compute Project form factor standard.
MULTI HOST MAGIC - Innovative rack design slashes CAPEX & OPEX without sacrificing performance.
BLAZING 25 6 GBPS SPEED - Experience lightning-fast data transfer that keeps your network ahead of the curve.
CROSS PLATFORM POWERHOUSE - Optimized for x86, Power, ARM, and GPU compute/storage environments.
LATENCY THAT WONT HOLD YOU BACK - Cut down response times for real-time applications and seamless virtualization.

The Mellanox ConnectX-4 Lx EN Network Adapter (MCX4121A-ACAT) delivers ultra-high 25.6 Gbps Ethernet throughput with industry-leading low latency, optimized for virtualized environments. Featuring Open Compute Project 2.0 form factor and innovative multi-host technology, it maximizes data center ROI by enabling advanced rack designs that reduce CAPEX and OPEX. Compatible across x86, Power, ARM, and GPU platforms, this adapter is engineered for cutting-edge performance in modern compute and storage infrastructures.

Specifications

ASIN	B011HVAZ78
Best Sellers Rank	#361 in Internal Computer Networking Cards
Brand	Mellanox
Built-In Media	Mellanox network adapter
Color	Assorted
Compatible Devices	Desktop
Customer Reviews	3.8 3.8 out of 5 stars (9)
Data Link Protocol	Ethernet
Data Transfer Rate	25600 megabits_per_second
Global Trade Identification Number	07290107197861
Hardware Interface	PCIE x 8
Item Type Name	ConnectX-4 Lx EN Network Adapter
Item Weight	2.88 ounces
Manufacturer	INGB9 Music Vendor Code
Mfr Part Number	MCX4121A-ACAT
Model Number	MCX4121A-ACAT
Unit Count	1 Count
Warranty Description	Unspecified

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

€ 167.22

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Slovakia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

View all Trustpilot reviews