PCIe x1 to 2.5G LAN CARD (RTL Chipset)


2 in stock

Product Overview


This 2.5G PCIe Network Card converts a PCIe slot (X1/X4/X8/16) into a 2.5G RJ45 Ethernet Port. It combines a four-speed IEEE802.3 compatible Media Access controller with a four-speed Ethernet transceiver. It complies with the IEEE802.3u specification for 10/100Mbps Ethernet, the IEEE802.3ab specification for 1000Mbps Ethernet and the latest IEEE802.3bz specification for Super-Fast 2500Mbps Ethernet. It offers high-speed transmission over CAT6/CAT5e UTP cable. It comes with standard brackets and low-profile bracket to meet the needs of different cases such as desktops, workstations, servers, mini tower computers and so on. This super-fast 2.5x-speed card provides much faster data-transfer speeds and is suitable for multiple market segments and emerging applications like gaming, communications platforms, live broadcasts, and downloads in bandwidth-demanding tasks.

Product Highlights:

  • 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) support
  • 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)
  • It is backwards compatible for 2.5Gbps/1Gbps/100Mbps
  • The heatsink provides excellent heat dissipation and reduces the temperature quickly to maintain the stability of network transmission.
  • Support Win7 / Sever2008/Win8/ Server 2012 / Win10 /Win11 / Linux, DOS, no driver needed on Windows10, easily download the driver in Realtek official website for other OS


SKU CodeER3019B
Product modelPCIe x1 to 2.5G LAN CARD (RTL Chipset)
ChipsetRTL 8125B
Form FactorPlug-in Card with Small Form Factor Support
Small/Low Profile BracketProvided
PCIe Specification RevisionPCIe 2.1
PCI-Express Transfer Rate5.0 Gbps
Input Bus InterfacePCI Express x1 - Compatible with x1/x4/x8/x16 slots
Output Interface1 x 2.5 Gbps RJ-45 Ethernet port (Copper)
Data Transfer Rate100/1000M/2.5G
Dimensions 80 x 42 mm
Weight34.8 gms
System supportedVista /Win7 / Sever2008/Win8/ Sever 2012 / Win10 /Win11 / Linux, DOS
Accessories1 x CD-driver, 1 x Low profile bracket, 1 x PCIe Card
Warranty*1 year





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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