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

Product ID: 299179111

Details

Brand
Mellanox
Colour
Assorted
Compatible devices
Desktop
Data link protocol
Ethernet
Hardware interface
PCIE x 8

⚡25.6 Gbps blazing throughput

🏢Multi-host tech for max ROI

🖧PCIe x8 high-speed interface

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S$206

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Description

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

PC IE X 8 INTERFACE - Seamlessly integrates with your server for ultra-low latency and efficient CPU offload.
OCP 2 0 FORM FACTOR - Future-proof your infrastructure with industry-standard open compute compatibility.
MULTI HOST TECHNOLOGY - Revolutionize your data center with innovative rack designs that slash CAPEX and OPEX.
VIRTUALIZATION OPTIMIZED - Host more VMs per server with cutting-edge performance in virtualized overlay networks.
BLAZING 25 6 GBPS THROUGHPUT - Experience lightning-fast data transfer that accelerates your web and storage performance.

The Mellanox ConnectX-4 Lx EN Network Adapter (MCX4121A-ACAT) delivers industry-leading 25.6 Gbps Ethernet throughput with ultra-low latency via a PCIe x8 interface. Designed for Open Compute Project 2.0 compliance, it supports multi-host technology to maximize data center ROI by enabling innovative rack designs and enhanced virtualization performance, making it ideal for high-demand server and storage environments.

Specifications

ASIN	B011HVAZ78
Best Sellers Rank	#17,258 in Computers ( See Top 100 in Computers ) #38 in Network Cards
Brand	Mellanox
Built-In Media	Mellanox network adapter
Color	Assorted
Compatible Devices	Desktop
Customer Reviews	1.0 1.0 out of 5 stars (1)
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	0.18 Pounds
Manufacturer	INGB9 Music Vendor Code
Mfr Part Number	MCX4121A-ACAT
Model Number	MCX4121A-ACAT
Unit Count	1 Count

Reviews

I**D

Israeli made!!!!!

27.07.2021

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