Best Rj 45 Network Cards in 2026

M.2 SSD & 10GbE combo adapter card for performance acceleration

Achieve Multi-Gig Ethernet transmission speeds of up to 10 Gbps

Accelerate random I/O performance with the dual M.2 2280/22110 NVMe SSD slots

Controller(s)：Realtek RTL8125.

Single RJ-45 Ports.

PCI Express* 2.1. 2.5 G T/s X1 Lane is suitable for PCI-E X1/ X4/ X8/ X16 slots.

Ultra Fast Speed— RJ-45 ports 100/1000/2500Mbps let you connect to network cable and upgrade your Ethernet speed to 2.5 gigabit easily

Stable Performance— Equipped with original Realtek RTL8125 controller chip which supports WOL, PXE, DPDK, VLAN, Jumbo Frames

Comprehensive System Support— Support Windows 7/8/10, Windows Server 2012/2008, Centos/RHEL 6/7/8, Ubuntu 16/18/19/20, Debian 9/10/11 and more

10G Network Card ：Adopting Marvell AQtion AQC113C Controller, it provides up to 10 Gbps of extreme speed to ensure the stability of Internet access and local data transmission, effectively preventing packet loss and making the server more stable.

Good compatibility: seamless backward compatibility with 10Gbps/5Gbps/2.5Gbps/1Gbps/100Mbps can auto-negotiate between high-speed and low-speed connections, supports Windows 11/10 and Windows Server , comes in the box with a USB drive to store drivers to avoid the hassle of downloading drivers.

PCIe to 10Gbe RJ45: This 10G BASE-T PCIe network adapter converts PCIe slots (X4/X8/16) into 10G RJ-45 Ethernet ports. Note: Only for PCIe ports, not for PCI slots.

Hyper-fast 10Gbps networking delivers up to 10X-faster data-transfer speeds for bandwidth-demanding tasks

Full compatibility with current network standards, including 10/5/2.5/1Gbps and 100Mbps, for seamless backward compatibility

Windows and Linux support for flexible OS integration with Windows 10/8.1/8/7 and Linux Kernel 4.4/4.2/3.6/3.2

HARDWARE INTERFACE: 1 x 10Gbps RJ-45 Ethernet port (Supported Speeds: 10Gbps / 5Gbps / 2.5Gbps / 1Gbps / 100Mbps), PCIe 3.0 x4 interface, LED indicators

PCI EXPRESS: This 10GbE PCIe card converts a PCIe 2.0 or 3.0 x4 slot into a 10G Ethernet Port

10G PORT: 10G PCIe card adapter supports five speeds: 10Gbps, 5Gbps, 2.5Gbps, 1Gbps, and 100Mbps

RJ-45 ports 100/1000/2500Mbps let you connect to network cable and upgrade your Ethernet speed to 2.5 gigabit easily.

Equipped with original Realtek RTL8125 controller chip which supports WOL, PXE, DPDK, VLAN, Jumbo Frames. Support 2.5G and 1G Lite mode. Compatible with NBASE-T Alliance PHY Specification. Compliant with IEEE 802.3,IEEE 802.3u,IEEE 802.3ab.

Compatible for X1,X4,X8,X16. Comes with standard bracket and low-profile-bracket to meet the needs of different cases. And driver link is on the bracket, pls freely download.

ADD AN ETHERNET PORT TO ANY PC: Use this dual port PCIe network card to add a two independent Gigabit Ethernet RJ45 ports to a client, server or workstation through one PCI Express slot

ULTIMATE COMPATIBILITY: The PCI Express NIC server adapter network card uses the Realtek RTL8111 series chipset which offers out-of-the-box compatibility with most desktop and server operating systems

ADVANCED FEATURES: This PCIe network adapter has a broad feature set that supports Auto MDIX, full and half duplex speeds, wake-on-LAN (WoL) and 9K jumbo frames

Ethernet Controller(s): for Intel I350AM2

PCI Express* 2.1 (5GT/s) , operable in x4 or greater slots

Scalable iSCSI performance delivering cost-effective SAN connectivity

【Date Rate】10/100/1000Mbps, up to 100m via Cat5/ Cat6/ Cat7 cable for meeting the demands of data center environments.

【Intel(R) 82573 Ethernet Controller】Compatible to ‎82573-T1. Single RJ-45 Ports Auto-negotiation 10/100/1000Mbps

【System Interface】PCIe 1.0a 2.5GT/sec, x1 Lane, PCIE_X1. Support PXE/ VLAN. Not support WOL/ SR-IOW/ ISCSI.

【Stable & Reliable】The Ethernet server network adapter equipped with the original BCM5719 controller chip, by providing unparalleled features of virtualization, flexible features, and proven reliable performance, upgrades to servers or workstations in need of enhanced performance, advanced features, and greater reliability.

【Convert PCIe Slot to Quad RJ45 Port】Equipped with RJ45 port which can set up a long-distance link with a file server or a remote workstation, up to 100m of CAT5/CAT6/CAT7 connection meeting the demands of data center environments. Improve computer network utilization, network bandwidth, and network control ability.

【High Performance】Provides fully compliant 10/100/1000 RJ-45 Ethernet port through each PCIe slot, meeting the demands of data center environments, PCIe v2.1 ( 2.5GT and 5.0GT/s) x4 Lane compatible with PCIE X4, X8, X16 Slot, the network card provides an effective upgrade or replacement network port.

Transmission rates: 2.5Gbps/1Gbps/100Mbps/10Mbps

Supported operating systems: QTS/QuTS hero (recommend an upgrade to the latest version); Windows 10 (1809 or later); Linux Stable Kernel 4.20/5.x; Windows Server 2019 (Driver required)

Supported QNAP NAS: Models with PCIe slot(s) (1 free slot required)

4 x RJ45 copper port I340T4BLK card supports for multi-core processors and server virtualization for your networking requirements

Interface Type: PCIe v2.0 (5.0 GT/s) X4,Compatible x8,x16 lane. Low profile bracket and driver CD will be packaged.

Cabling Type: It offers high-speed transmission over CAT5e UTP cable or CAT3 UTP(10Mbps only)cable. (Cat5e / Cat6 / Cat6A or higher cable is recommended.);Transmission rate: 10/100/1000Mbps.

Supports 10Gbps/5Gbps/2.5Gbps/1Gbps/100Mbps connections to work with almost all RJ-45 network environments

Expanding system capabilities through 10GbE connectivity

Easy integration with support for 5/2.5/1Gbps networks

Ethernet Controller(s): for Intel 82576

PCI Express* v2.0 (2.5 GT/s), PCI Express x1, Compatible with PCIe x4/x8/x16 slot

Simple Network Management Protocol (SNMP) and Remote Network Monitoring (RMON) statistic counters

✅ Easily add two multi-Gigabit Ethernet ports through an available x4 PCIe slot to server and desktop computers Compliant with PCI Express Specification Revision 2.1

✅ Compatible with NBASE-TTM Alliance PHY Specification Supports 4 Multi-Speed of 10M/100M/1Gbps/2.5Gbps Ethernet data rates

✅ Compatible with IEEE 802.3, 802.3u, 802.3a, IEEE 802.3bz (2.5GBase-T), IEEE 802.1Q VLAN tagging, IEEE 802.3az (Energy Efficient Ethernet) Supports jumbo frame to 16K bytes for higher and better data throughput

X520/I350 Network Daughter Card

Part #: 0C63DV (C63DV)

Ports: 2x 10 Gbps SFP, 2x 1Gbps RJ-45

MPN: DGE-530T

✅ Easily add a multi-Gigabit Ethernet port through an available x1 PCIe slot to server and desktop computers Compliant with PCI Express Specification Revision 2.1

✅ Compatible with NBASE-TTM Alliance PHY Specification Supports 4 Multi-Speed of 10M/100M/1Gbps/2.5Gbps Ethernet data rates

✅ Compatible with IEEE 802.3, 802.3u, 802.3a, IEEE 802.3bz (2.5GBase-T), IEEE 802.1Q VLAN tagging, IEEE 802.3az (Energy Efficient Ethernet) Supports jumbo frame to 16K bytes for higher and better data throughput

High-quality master control. Adopt for Raychem RTL8111G high-performance master control dual chip, one for each RJ45 interface, stable performance and good compatibility.

The imported alloy heat sink can effectively discharge excess heat, so that the network card is always at normal temperature and the operation is stable.

The filter can stably handle the filtering cable interference and extend the transmission distance of the network cable.

Broadcom 57800S Network Daughter Card

Part #: 0165T0 (165T0)

Ports: 2x 10Gbps SFP, 2x 1Gbps RJ-45