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, Single SFP+ Port, with Intel 82599EN Controller, Ethernet LAN Adapter Support Windows Server/Linux/VMware, Compare to Intel X520-DA1(E10G42BTDA)

10Gtek 10Gb PCI-E NIC Network Card, Single SFP+ Port, with Intel 82599EN Controller, Ethernet LAN Adapter Support Windows Server/Linux/VMware, Compare to Intel X520-DA1(E10G42BTDA)

Product ID: 34831237

Details

Brand
10Gtek
Color
Compatible Devices
Server Desktop
Compatible Operating System Family
Linux Windows
Data Link Protocol
Ethernet
Data Transfer Rate
10 Gigabytes

⚡10Gbps blazing speed

🔌Single SFP+ port for high-speed fiber

🖥️Intel 82599EN controller for rock-solid stability

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Description

🚀 Upgrade your network, join the 10G elite!

BLAZING 10 GBPS THROUGHPUT - Experience ultra-fast data transfer that leaves 1G and 2.5G adapters in the dust.
INTEL POWERED RELIABILITY - Equipped with the trusted Intel 82599EN controller for enterprise-grade stability and I/O virtualization.
VERSATILE OS COMPATIBILITY - Supports Windows Server, Linux, VMware, and more — future-proof your network infrastructure.
SEAMLESS FIBER CONNECTIVITY - Single SFP+ port lets you plug into cutting-edge 10G fiber modules or DAC/AOC cables effortlessly.
COMPACT FLEXIBLE INSTALLATION - Includes both standard and low-profile brackets to fit any server or sleek desktop chassis.

The 10Gtek 10Gb PCI-E NIC Network Card features a single SFP+ port powered by the Intel 82599EN controller, delivering blazing 10Gbps Ethernet speeds. Compatible with major operating systems including Windows Server, Linux, and VMware, it supports advanced virtualization and is designed for both standard and low-profile installations. Ideal for professionals demanding high-performance, reliable network connectivity in data centers or high-end workstations.

Specifications

ASIN	B01LZRSQM9
Best Sellers Rank	#10 in Internal Computer Networking Cards
Brand	10Gtek
Color	X520-10G-1S(1xSFP+)
Compatible Devices	Server, Desktop
Compatible Operating System Family	Linux, Windows
Customer Reviews	4.4 4.4 out of 5 stars (476)
Data Link Protocol	Ethernet
Data Transfer Rate	10 Gigabytes Per Second
EU Spare Part Availability Duration	3 Years
Hardware Interface	PCIE x 8
Item Weight	86 Grams
Manufacturer	10Gtek
Mfr Part Number	X520-DA1(Intel-1pc)
Minimum Required Operating System Version	Windows 10
Model Number	8541551539
Unit Count	1.0 Count

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