PCIe x1 to 2-Port 2.5G Lan Card (RTL 8125B Chipset)


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Product Overview


The PCIe x1 RTL8125B Dual-Port 2.5G network adapter is realized by the combination of multiple chips, it is combines a four-speed IEEE802.3 compatible Media Access controller with a four-speed Ethernet transceiver, it is complies with the IEEE802.3u specification for 10/100Mbps Ethernet ,the IEEE802.3ab specification for 1000Mbps Ethernet and IEEE802.3bz 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.


  • 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
  • Wake-On-LAN and ‘RealWow!’ Technology (remote wake-up)supports
  • Compatible with IEEE802.3,IEEE802.3u,IEEE802.3ab
  • Supports IEEE1588v1,IEEE1588v2,IEEE80.2AS time synchronization
  • Supports IEEE802.1Qav credit-based shaper algorithm
  • Supports IEEE802.1P Layer 2 Priority encoding
  • Supports IEEE802.1Q VLan tagging
  • Supports IEEE802.1ad Double VLAN
  • Supports IEEE802.3az (Energy Efficient Ethernet)
  • Supports IEEE802.3bz(2.5GBase-T)
  • Supports full duplex flow control(IEEE802.3x)
  • 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
  • Chipset: RTL8125B+ASM1806




Realtek 2.5G Linux Drivers

Realtek 2.5G Win7/Server2008 R2

Realtek 2.5G Win8/8.1/Server2012

Realtek 2.5G Windows10 Drivers

Realtek 2.5G Windows11 Drivers



Duration (Warranty Period)12 Months (from Invoice date)DOA (Dead on Arrival) Period7 Days (from Invoice date)TypeReturn to Base (Eira Tek)RTB (Return to Base) Period12 Months (from Invoice date)

* For further information regarding Eira Tek’s warranty procedure, please see our Warranty Policy.

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