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

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

Product ID: 33382921

Details

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

⚡10Gbps blazing speed

🔗Dual SFP+ ports for versatile connectivity

🖥️Intel 82599ES for rock-solid stability

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Details

Brand
10Gtek
Color
Compatible Devices
Server Desktop

Description

🚀 Upgrade your network, upgrade your game!

DUAL SFP PORTS - Seamlessly connect with 10G SFP+ modules, DAC, or AOC cables for flexible, high-performance setups.
INTEL 82599 ES CONTROLLER - Leverage enterprise-grade reliability and I/O virtualization for stable, efficient server operations.
BLAZING 10 GBPS THROUGHPUT - Experience ultra-fast data transfer that future-proofs your network infrastructure.
PLUG PLAY ON LINUX WINDOWS SERVER - Optimized compatibility across major OS platforms ensures hassle-free deployment in professional environments.
LOW PROFILE STANDARD BRACKETS INCLUDED - Effortlessly install in compact or full-sized cases—perfect for sleek home labs or dense data centers.

The 10Gtek 10Gb PCI-E NIC Network Card features dual SFP+ ports powered by the Intel 82599ES controller, delivering reliable 10Gbps Ethernet connectivity. Compatible with Windows Server, Linux, and VMware, it supports PCI-E x8 slots and includes both standard and low-profile brackets for versatile installation. Ideal for professionals seeking high-speed, stable networking solutions at a fraction of the cost of OEM alternatives.

Specifications

ASIN	B01DCZCA3O
Best Sellers Rank	#13 in Internal Computer Networking Cards
Brand	10Gtek
Color	X520-10G-2S(2xSFP+)
Compatible Devices	Server, Desktop
Customer Reviews	4.3 out of 5 stars 224 Reviews
Data Link Protocol	Ethernet
Data Transfer Rate	10 Gigabytes Per Second
Hardware Interface	PCIE x 8
Item Dimensions L x W x H	10.35"L x 6.42"W x 2.17"H
Item Weight	0.35 Pounds
Manufacturer	10Gtek
Mfr Part Number	10Gtek X520-DA2
Model Number	X520-DA2(Intel-1pc)(UK)
Product Dimensions	10.35"L x 6.42"W x 2.17"H
UPC	603149407824

Reviews

K**R

26.02.2026

W**S

24.05.2025

R**.

16.01.2025

M**T

19.05.2018

E**S

22.08.2025

C**O

9.11.2023

A**R

3.05.2023

M**E

23.01.2024

B**A

12.08.2019

J**A

17.01.2026

A**4

12.09.2025

B**G

22.12.2025

C**T

12.06.2025

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In stock

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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 Panama.

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