Design
Cooling type	Passive
Country of origin	China
Internal
Features
Data transfer rate (max)	2.5 Gbit/s
Other features
Dimensions (WxDxH)	120 x 1.64 x 110 mm
Packaging data
Package width	140 mm
Package depth	150 mm
Package height	30 mm
Package weight	95 g
Package volume	700 cm³
Mounting brackets included
Ports & interfaces
Host interface	PCIe
Host interface gender	Male
Output interface	RJ-45
Expansion card standard	PCIe 2.1
System requirements
Windows operating systems supported	Windows 10, Windows 11, Windows 7, Windows 8, Windows Vista
Linux operating systems supported	Kernel 2.6, Kernel 2.6.31, Kernel 2.6.33, Kernel 3.12, Kernel 3.17, Kernel 3.3, Kernel 4.6.4, Linux Kernel 5.10, Linux Kernel 5.11, Linux Kernel 5.12, Linux Kernel 5.13, Linux Kernel 5.14, Linux Kernel 5.15, Linux Kernel 5.19, Linux Kernel 5.4, Linux Kernel 5.8, Linux Kernel 5.9, Linux Kernel 6.2
Server operating systems supported	Windows Server 2008, Windows Server 2012, Windows Server 2013, Windows Server 2016, Windows Server 2019, Windows Server 2022
Technical data
Height packaging	0.030m
Length packaging	0.150m
Net weight	0.095kg
Connections internal	None
Chipset	Realtek RTL8125B
Width packaging	0.140m
Article width	11.00cm
Transmission rate	2.5Gb/s
Interface	Network
Slot	PCIe
Article length	12.00cm
Type	Network card
Connections external	4x RJ45 socket
Article height	3.00cm
Packaging volume	0.0007m³
Weight	0.164kg
Low Profile
Weight & dimensions
Width	120 mm
Depth	1.64 mm
Height	110 mm
Weight	3 kg

Quadruple power for your network: Benefit from four 2.5Gb/s RJ45 ports for maximum speed in home or office networks.
Easy upgrade via PCIe: Compatible with x4 slots, ideal for modern desktop PCs and workstations.
Future-proof & energy-efficient: Supports IEEE802.3az and many industry standards - ready for Gigabit+ home networks.
Flexible installation including low-profile bracket: Also ideally suited for compact housings, ideal for small spaces.
Multifunctional for gamers & power users: Supports Wake-on-LAN, VLAN, VMQ, RSS - perfect for demanding network applications.
Experience a new level of network performance with the InLine® Quad Gigabit network card 51127A. This high-quality PCIe card offers four RJ45 ports with up to 2.5Gb/s data rate each - ideal for demanding applications such as gaming, streaming or use in powerful home servers.
The Realtek RTL8125B chipset ensures reliable performance and full compatibility with common operating systems such as Windows and Linux. Thanks to energy-efficient standards (IEEE802.3az), extensive VLAN and offload functions as well as support for Wake-on-LAN, RealWoW and time synchronisation in accordance with IEEE1588v2, this card is ideally equipped for modern networks.
Installation is simple: The card fits into all PCIe x4 (and higher) slots and is supplied with a low-profile bracket - making it suitable for compact housings. Support for ECC and CRC error correction, RSS, VMQ and jumbo frames rounds off the performance package.
Whether as an upgrade for your home network, for virtualised environments or data-intensive multimedia applications - this network card combines performance, efficiency and flexibility at the highest level.
Chip set Realtek RTL8125B
Complies with PCI Express Revision V2.1
2-lane PCI Express bus connection with up to 10Gb/s bus width
PCI Express interface: x4
Supports 1-lane 2.5/5 Gb/s PCI Express bus
Supports 2.5G and 1G Lite mode
Auto-negotiation with Extended Next Page capability (XNP)
Supports pair swap/polarity/skew correction
Supports the ECC function (Error Correction Code)
Supports the CRC function (Cyclic Redundancy Check)
Supports PCI MSI (Message Signalled Interrupt) and MSI-X
Supports on-chip buffers for sending and receiving
Supports ECMA-393 ProxZzzy standard for hosts in sleep mode
Supports Wake on LAN (WoL) and RealWoW (remote wake-up)
Supports IEEE1588v1,IEEE1588v2,IEEE80.2AS time synchronisation
Supports IEEE802.1Qav credit-based shaper algorithm
Supports IEEE802.1P Layer 2 priority coding
Supports IEEE802.1ad Double VLAN
Supports IEEE 802.3az (energy efficient Ethernet, EEE)
Supports IEEE802.3bz (2.5GBase-T)
Supports 16KB jumbo frames
Supports Virtual Machine Queue (VMQ)
Supports quad core receive side scaling (RSS)
Supports protocol offload (ARP&NS)
Backward compatible with 10/100BASE-TX networks
10 / 100 / 1000 / 2500 Mb/s data rate
Compatible with existing CAT-5e UTP cabling or higher
Fully compatible with IEEE 802.3, 802.3u, 802.3ab
Supports full-duplex flow control (IEEE 802.x)
Supports IEEE 802.1Q VLAN tagging
Crossover detection and auto-correction mode
Supports Microsoft Windows Vista or newer, Server 2008 or newer, Linux Kernel 2.4.x or newer