What's the difference between the x540-t2 and x550-t2 ?

The X520 and X540 have a PCIe 2.0 x8 interface, which has 32Gbit/s bandwidth. The X550 has a PCIe 3.0 x4 interface, which has 32Gbit/s bandwidth. The single-port versions may be used in slower slots: X520-T1/DA1 or X540-T1/DA1 will work in a PCIe 2.0 x4 slot (at 16Gbit/s); the manual says the T550-T1 should work in a PCI 2.0 x4 slot as well, although I haven’t tried it.

Has anyone actually gotten close to the 10gbps connection speed for this card? pcie 2.0 has limit of 5 gt/s or about 4gpbs max. so can it be 10gb?

The card is PCIe 2 with x8 lanes, which is 4 GigaByte per second. 4 GigaByte is the same as 32 GigaBit, so it should handle 10 GigaBit just fine.

Will this card negotiate down to a pcie gen 3 x2? i think my only free x4 slot only runs in x2 mode which is why i'm asking.

No, please kindly note that the X550-T1 supports PCIe v3.0 (8.0GT/s) (Compatible with 2.0 and 1.1) X4/X8/X16 Lane, and it does not support X2.

does this work with windows 11?

I have not gotten it to work with windows 11. The seller says to install drivers 26.7 but those dont work

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10Gtek Dual SFP+ Port 10Gb PCI-E NIC Network Card, Intel 82599ES Controller, PCI Express Ethernet LAN Adapter for Windows Server/Linux/VMware, Compare to Intel X520-DA2 (E10G42BTDA)

10Gtek Dual SFP+ Port 10Gb PCI-E NIC Network Card, Intel 82599ES Controller, PCI Express Ethernet LAN Adapter for Windows Server/Linux/VMware, Compare to Intel X520-DA2 (E10G42BTDA)

Product ID: 348353704

Details

Brand
10Gtek
Colour
Multicolor
Compatible Devices
Desktop
Data Link Protocol
Ethernet
Data Transfer Rate
10 Gigabytes
Hardware Interface
PCIE x 8

⚡10Gbps ultra-fast data transfer

🔗Dual SFP+ ports for versatile connectivity

🖥️PCI-E X8 compatible with X16 slots

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VT34598

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Description

⚡ Power Your Network with 10Gtek – Because Speed Waits for No One!

DUAL SFP PORTS - Seamlessly connect with 10G SFP+ modules, DAC, or AOC cables for ultimate flexibility.
BLAZING 10 GBPS SPEED - Experience lightning-fast network performance that keeps your data center ahead of the curve.
COMPACT VERSATILE DESIGN - Comes with standard and low-profile brackets to fit any server chassis, from full-size to small form factor.
UNIVERSAL PCI E COMPATIBILITY - Fits perfectly in both PCI-E X8 and X16 slots, maximizing your server’s potential.
PLUG PLAY WITH INTEL DRIVERS - Includes native driver CD and easy downloads for hassle-free installation across Windows and Linux.

The 10Gtek X520-DA2 is a high-performance 10 Gigabit Ethernet network adapter powered by the original Intel 82599ES chip. Designed for data centers and professional environments, it features dual SFP+ ports for flexible 10Gb connectivity and supports PCI-E X8 and X16 slots. Compatible with a wide range of operating systems including Windows and Linux, it offers stable, virtualized I/O performance. The package includes driver support, multiple bracket options for easy installation, and is backed by a 1-year warranty and lifetime tech support.

Specifications

ASIN	B01DCZCA3O
Best Sellers Rank	#61,617 in Computers & Accessories ( See Top 100 in Computers & Accessories ) #99 in Network Interface Cards
Box Contents	Desiccant Packet, Low-Profile Bracket
Brand	10Gtek
Brand Name	10Gtek
Color	Multicolor
Colour	Multicolor
Compatible Devices	Desktop
Country of Origin	USA
Customer Reviews	4.5 out of 5 stars 219 Reviews
Data Link Protocol	Ethernet
Data Transfer Rate	10 Gigabytes Per Second
Hardware Interface	PCIE x 8
Importer Contact Information	Clicktech Retail Private Limited, 18, Rabindra Sarani, Poddar Court, Gate No.2, Ground Floor Kolkata, West Bengal, 700001. Phone: 18004192373, Email: [email protected]
Item Dimensions L x W x H	12.5L x 6.9W x 1.8H Centimeters
Item Type Name	Network Card
Item Weight Unit of Measure	159 g
Manufacturer	10Gtek, Shenzhen 10Gtek Transceivers Co. Ltd, Dongguan Branch, Area B, 5th Floor, Building 11, Jinnuo Industrial Park, Technology Avenue, Hetian Community, Houjie Town, Dongguan City, Guangdong Province, P.R. China, Email: @10gtek.com
Manufacturer Contact Information	Shenzhen 10Gtek Transceivers Co. Ltd, Dongguan Branch, Area B, 5th Floor, Building 11, Jinnuo Industrial Park, Technology Avenue, Hetian Community, Houjie Town, Dongguan City, Guangdong Province, P.R. China, Email: @10gtek.com
Manufacturer Part Number	10Gtek X520-DA2
Model Number	X520-DA2(Intel-1pc)(UK)
Packer Contact Information	Shenzhen 10Gtek Transceivers Co. Ltd, Dongguan Branch, Area B, 5th Floor, Building 11, Jinnuo Industrial Park, Technology Avenue, Hetian Community, Houjie Town, Dongguan City, Guangdong Province, P.R. China, Email: @10gtek.com
Product Dimensions	12.5L x 6.9W x 1.8H Centimeters
UPC	603149407824
Unit Count	1 Count
Warranty Description	2 Year Manufacturer

Reviews

K**R

26.02.2026

B**A

12.08.2019

J**A

17.01.2026

A**4

12.09.2025

B**G

22.12.2025

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VT34598

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Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vanuatu.

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