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)

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

⚡10Gbps blazing speed

🔌Single SFP+ port for high-speed fiber

🖥️Intel 82599EN controller for rock-solid stability

NT$3090

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Sold byAmazon TaiwanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Upgrade your network, outrun the competition!

DATA CENTER READY - Single SFP+ port supports fiber modules and DAC/AOC cables to meet demanding network needs.
SEAMLESS COMPATIBILITY - Supports Windows Server, Linux, VMware—perfect for diverse enterprise environments.
PLUG PLAY VERSATILITY - Fits PCI-E x8/x16 slots with included low-profile bracket for flexible installation.
BLAZING 10 GBPS THROUGHPUT - Experience ultra-fast data transfer that future-proofs your network infrastructure.
ENTERPRISE GRADE STABILITY - Powered by Intel 82599EN controller ensuring reliable I/O virtualization and uptime.

The 10Gtek 10Gb PCI-E NIC Network Card features a high-performance Intel 82599EN controller and a single SFP+ port delivering 10Gbps Ethernet speeds. Compatible with Windows Server, Linux, and VMware, it fits PCI-E x8 and x16 slots and includes a low-profile bracket for versatile installation. Ideal for data centers and professional setups demanding stable, high-speed connectivity.

Specifications

ASIN	B01LZRSQM9
Best Sellers Rank	#13 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 out of 5 stars 823 Reviews
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 g
Manufacturer	10Gtek
Mfr Part Number	X520-DA1(Intel-1pc)
Minimum Required Operating System Version	Windows 10
Model Number	8541551539
Number of Items	1
Unit Count	1 Count

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