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 Megabits
Global Trade Identification Number

⚡25.6 Gbps blazing throughput

🔗Multi-host tech for max ROI

🖧OCP 2.0 form factor ready

$263.35

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Description

🚀 Elevate your data center game with next-gen speed and efficiency!

OCP 2 0 FORM FACTOR - Seamlessly integrate with modern data center designs for streamlined scalability.
MULTI HOST TECHNOLOGY - Maximize CAPEX and OPEX savings by connecting multiple hosts without sacrificing performance.
BLAZING 25 6 GBPS THROUGHPUT - Experience ultra-fast data transfer speeds that keep your network ahead of the curve.
CROSS PLATFORM SMART INTERCONNECT - Optimized for x86, Power, ARM, and GPU platforms to future-proof your infrastructure.
LOW LATENCY FOR REAL TIME RESPONSE - Cut down delays to power virtualized environments and boost server efficiency.

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 innovative multi-host technology, it enables cost-effective, high-performance networking across x86, Power, ARM, and GPU platforms, making it ideal for virtualized servers and modern data centers aiming to maximize ROI.

Specifications

ASIN	B011HVAZ78
Best Sellers Rank	#218 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	1.0 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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$263.35

Duties & taxes included

In stock

Sold byAmazon EcuadorDelivered 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 Ecuador.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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