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

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

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 blazing throughput

💼Multi-host tech for max ROI

🕒Ultra-low latency for real-time response

848 Lei

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Sold byAmazon RomaniaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

OCP 2 0 FORM FACTOR - Future-proof your infrastructure with industry-standard open compute compatibility.
MULTI HOST TECHNOLOGY - Revolutionize your rack design and slash CAPEX/OPEX without sacrificing speed or reliability.
BLAZING 25 6 GBPS THROUGHPUT - Experience lightning-fast data transfer that powers your most demanding workloads.
ULTRA LOW LATENCY PERFORMANCE - Cut down wait times with near-instantaneous network response, perfect for virtualized environments.
CROSS PLATFORM SMART INTERCONNECT - Seamlessly integrates with x86, Power, ARM, and GPU platforms for versatile deployment.

The Mellanox ConnectX-4 Lx EN Network Adapter (MCX4121A-ACAT) delivers industry-leading 25.6 Gbps Ethernet throughput and ultra-low latency, optimized for virtualized server and storage 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, high-demand networking scenarios.

Specifications

ASIN	B011HVAZ78
Best Sellers Rank	#174 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

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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.

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848 Lei

Duties & taxes included

In stock

Sold byAmazon RomaniaDelivered 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 Romania.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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