Intel Ethernet Server Adapter I340-T4 1Gbps RJ-45 Copper - Reliable

In this review the Intel Ethernet Server Adapter I340-T4 is presented as a straightforward, no-nonsense 4x RJ45 1Gbps server NIC best suited to virtualization hosts and Linux or ESXi environments. The bottom line: this adapter delivers stable 1Gbps copper ports on a PCI Express x4 interface with broad OS support and plug-and-play installation, making it a practical choice for IT shops needing predictable wired performance without exotic features. For anyone building small racks or upgrading older servers, the I340-T4 offers reliable connectivity at a reasonable cost.

Key Features

• Quad 1Gbps RJ45 ports: Four copper 1Gbps ports provide immediate network expansion without additional transceivers, useful for VLAN separation or redundant links.
• PCI Express 2.0 x4 interface: The card operates in x4, x8 or x16 slots and uses a PCIe 2.0 (5 GT/s) bus to deliver stable throughput in typical server platforms.
• Intel 82580 controller: The onboard Intel controller offers mature driver support and predictable behavior under Linux and virtualization hosts like ESXi.
• OEM bulk packaging: A bulk pack option is practical for system integrators who deploy multiple units and prioritize cost over retail packaging.
• Plug-and-play installation: Customers report easy setup and automatic recognition by modern server OS builds, reducing time spent on driver configuration.

Who It's For

The I340-T4 is ideal for home lab builders, small datacenter nodes and systems running Hyper-V or ESXi where stable 1Gbps ports and broad driver compatibility matter more than 10Gbps performance. It fits well in older servers that have free PCIe slots and need additional copper NIC ports without changing network cabling.

Administrators who require higher than 1Gbps per port, fiber optics, or advanced offload features should look elsewhere. Likewise, buyers seeking retail packaging, bundled cables or managed switch features built into the NIC will not find those extras here.

Pros & Cons

Pros

• Stable and compatible with mainstream server OS builds, especially Linux and ESXi.
• Four onboard RJ45 ports provide flexible connectivity without extra hardware.
• Simple, plug-and-play installation reduces deployment time for multiple servers.
• Solid component quality suitable for continuous server usage.

Cons

• Limited to 1Gbps per port, so it will not meet needs for high-throughput 10Gbps links.
• OEM bulk packaging means minimal documentation included in the box.

Specifications

Brand	Intel
Model	I340-T4 (Intel 82580 controller)
Ports	4 x RJ45 1Gbps
Interface	PCI Express 2.0 x4 (operable in x4, x8, x16)
Cabling	Copper (RJ-45)
Packaging	OEM bulk pack

Our Verdict

The Intel I340-T4 is a pragmatic, cost-effective quad-port 1Gbps server adapter for virtualization hosts and Linux servers that need reliable copper networking. It is good value for IT teams and integrators who prioritize stable drivers and easy deployment, but it is not the choice for users who need 10Gbps or optical connectivity.

Frequently Asked Questions

Will this work with ESXi?
Yes, the card uses an Intel 82580 controller and is reported to be automatically supported by modern ESXi releases when native drivers are available.

Does it require a full x4 slot?
No, the adapter is PCIe x4 but is operable in x4, x8 or x16 slots, so it fits a variety of server motherboards.

Is transceiver or SFP required?
No, this adapter uses onboard RJ45 copper ports, so no external transceivers or SFP modules are needed.