Dual-Port 2.5GBase-T PCIe Network Adapter RTL8125B 2500/1000/100Mbps PCI Express Gigabit Ethernet NIC Card RJ45 LAN Controller

Pls choose the correct cable and Ethernet Standard. To get 2.5G transmission speed, You'd better choose CAT6A and IEEE 802.3 bz together
The PCIe x1 RTL8125B Dual-Port 2.5G network adapter is realized by the combination of multiple chips, it is combines a four-speed IEEE 802.3 compatible Media Access controller with a four-speed Ethernet transceiver, it is complies with the IEEE 802.3 u specification for 10/100Mbps Ethernet, the IEEE 802.3 ab specification for 1000Mbps Ethernet and IEEE 802.3 bz specification for 2500Mbps Ethernet. Also it offers high-speed transmission over CAT5e UTP cable OR CAT3 UTP (10Mbps only) cable. it is suitable for multiple market segments and emerging applications, such as desktop, workstation, server, communications platforms, and embedded applications.

Specification:

Chipset: RTL8125B+ASM1806

Support PCI Express Specification Revision 2.1

PCI Express interface: X1

Integrated 10M BASE-Te and 100/1000M/ 2.5G base-T 802.3 compatible transceiver

Supports 2.5G and 1G Lite mode

Auto-Negotiation with Extended Next Page capability (XNP)

Supports pair swap/polarity/skew correction

Crossover Detection& Auto-Correction

Supports 1-Lane 2.5 /5Gbps PCI Express Bus

Supports hardware ECC (Error correction code) function

Supports hardware CRC (Cyclic Redundancy Check) function

Supports PCI MSI (Message Signaled Interrupt) and MSI-X

Transmit/Receive on-chip buffer support

Supports ECMA-393 ProxZzzy Standard for sleeping hosts

Compatible with IEEE 802.3, IEEE 802.3 u, IEEE 802.3 ab

Supports IEEE1588v1, IEEE1588v2, IEEE 80.2AS time synchronization

Supports IEEE 802.1Q av credit-based shaper algorithm

Supports IEEE 802.1P Layer 2 Priority encoding

Supports IEEE 802.1Q VLan tagging

Supports IEEE 802.1 ad Double VLAN

Supports IEEE 802.3 az (Energy Efficient Ethernet)

Supports IEEE 802.3 bz( 2.5GB ase-T)

Supports full duplex flow control(IEEE 802.3 x)

Supports jumbo frame to 16K bytes

Supports Virtual Machine Queue (VMQ)

Supports quad core Receive Side Scaling (RSS)

Supports Protocol Offload (ARP&NS)

Drivers for Vista /Win7 / Win8 / Win10 /Win11/ Sever2008 / Sever 2012 / Linux / DOS