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)

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

🖧OCP 2.0 form factor ready

€ 162.23

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Sold byAmazon FranceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Elevate your network game with ConnectX-4 Lx EN — where speed meets smart innovation!

MULTI HOST TECHNOLOGY - Maximize your data center ROI by connecting multiple hosts without sacrificing performance or efficiency.
BLAZING 25 6 GBPS THROUGHPUT - Experience ultra-fast data transfer speeds that crush bottlenecks and accelerate your workflows.
CROSS PLATFORM SMART INTERCONNECT - Optimized for x86, Power, ARM, and GPU platforms to unify your compute and storage environments effortlessly.
OCP 2 0 FORM FACTOR COMPATIBILITY - Seamlessly integrate with cutting-edge Open Compute Project racks for future-proof infrastructure.
LOW LATENCY FOR REAL TIME RESPONSE - Cut down lag and boost virtual machine density with industry-leading low latency networking.

The Mellanox ConnectX-4 Lx EN Network Adapter (MCX4121A-ACAT) delivers industry-leading 25.6 Gbps Ethernet throughput with ultra-low latency, designed for Open Compute Project 2.0 environments. Featuring multi-host technology, it enables innovative rack designs that maximize data center ROI by supporting multiple hosts on a single adapter. Compatible across x86, Power, ARM, and GPU platforms, it’s engineered to boost virtualized server and storage performance with smarter, faster connectivity.

Specifications

ASIN	B011HVAZ78
Best Sellers Rank	#239 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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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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TrustScore 4.5 | 7,300+ reviews

Abdullah B.

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

3 weeks ago

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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€ 162.23

Duties & taxes included

In stock

Sold byAmazon FranceDelivered 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 France.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

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

1 month ago

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