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

🖧PCIe x8 high-speed interface

🖥️Multi-host tech for max ROI

22780 som

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Description

🚀 Elevate your data center game with lightning-fast, multi-host networking!

PC IE X 8 INTERFACE - Seamlessly integrates with your server for low-latency, high-bandwidth connectivity.
MULTI HOST TECHNOLOGY - Revolutionize your rack design to maximize CAPEX and OPEX savings without sacrificing speed.
BLAZING 25 6 GBPS THROUGHPUT - Experience ultra-fast data transfer that accelerates your web and storage performance.
OPTIMIZED FOR VIRTUALIZATION - Host more VMs per server with cutting-edge performance in virtualized overlay networks.
OPEN COMPUTE PROJECT 2 0 READY - Future-proof your infrastructure with industry-standard form factor and enhanced network efficiency.

The Mellanox ConnectX-4 Lx EN Network Adapter (MCX4121A-ACAT) delivers industry-leading 25.6 Gbps Ethernet throughput and ultra-low latency via a PCIe x8 interface. Designed for Open Compute Project 2.0 compliance, it supports multi-host technology to optimize rack design and maximize ROI. Ideal for virtualized environments, it boosts server and storage performance by enabling more virtual machines per server with real-time responsiveness.

Specifications

ASIN	B011HVAZ78
Best Sellers Rank	#164 in Internal Computer Networking Cards
Brand	Mellanox
Built-In Media	Mellanox network adapter
Color	Assorted
Compatible Devices	Desktop
Customer Reviews	3.8 out of 5 stars 9 Reviews
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	1.0 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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22780 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered 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 Kyrgyzstan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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