Intel I350-T4 PCI-E X4 Quad RJ45 Ethernet Card - Gigabit

In this review the Intel I350-T4 PCI-E X4 Quad RJ45 Ethernet card is presented as a practical upgrade for desktops and small servers needing reliable wired networking. The bottom line: this adapter is for users who want stable gigabit Ethernet connectivity across four ports and broad OS compatibility without paying for enterprise-only features. Installation is straightforward and the chipset delivers consistent throughput for routed and virtualized setups, making it a sensible choice for home labs, pfSense boxes, and older systems that need extra LAN ports.

Key Features

• Intel I350 chipset: Provides proven, bridgeless performance and dependable network stack support for both virtualized and physical environments.
• Four 10/100/1000Mbps RJ45 ports: Lets a single card add four independent gigabit Ethernet connections, useful for routing, VLANs, and separate networks.
• PCI-E x4 interface: Uses a PCIe V2.1 x4 slot and is compatible with x8 and x16 slots for wide motherboard support and easy installation.
• Low profile and full-height brackets: Includes both brackets so the adapter fits compact towers and standard chassis without modification.
• Virtualization and iSCSI support: Features Flexible I/O Virtualization and scalable iSCSI performance which benefit hypervisors and storage offload.
• Energy and power features: Supports Energy Efficient Ethernet and power management technologies to reduce idle power draw in multi-port deployments.

Who It's For

The I350-T4 is best suited to IT hobbyists, home lab builders, and small business technicians who need more physical LAN ports or a reliable NIC for firewall and virtualization platforms like pfSense and ESXi. It is particularly useful when repurposing older desktops into routers or network appliances because of its wide OS compatibility.

Users who need guaranteed full line-rate 4x1Gb simultaneous transfers in heavy data center environments, or who require vendor-supported drivers and firmware from a specific server vendor, should consider enterprise-class options with dedicated support instead.

Pros & Cons

Pros

• Solid card quality and build with a recognized Intel controller that integrates well with many OSes.
• Easy installation and broad driver support, making it plug-and-play for pfSense, Linux, FreeBSD, and many Windows versions.
• Four independent gigabit ports provide flexibility for VLANs, separate LANs, or routing tasks in a single slot.
• Includes low-profile bracket for small form-factor cases.

Cons

• Some users report the card does not always achieve full gigabit speeds in every host configuration, so peak throughput can depend on system setup.
• Not an enterprise support channel; customers seeking vendor-managed solutions may prefer server-branded NICs.

Specifications

Brand	Jeirdus
Chipset	Intel I350
Ports	4 x RJ45 10/100/1000Mbps
Interface	PCI-E V2.1 x4 (compatible with x8, x16)
Brackets	Low profile and full-height included
OS Support	Windows XP to Server 2012 R2, Linux 2.4/2.6/3.x, FreeBSD, Solaris x86
Special features	Flexible I/O Virtualization, DMA coalescing, Energy Efficient Ethernet

Our Verdict

The Intel I350-T4 PCI-E Quad RJ45 card is a practical, cost-effective upgrade for anyone needing multiple gigabit ports with broad OS compatibility and good hardware quality. It is particularly good value for home labs, firewall builds, and virtualization hosts where reliable network interfaces matter more than vendor-managed enterprise support.

Frequently Asked Questions

Will this card work in my pfSense box?
Yes. The I350 chipset is widely compatible with pfSense and similar firewall distributions and is commonly reported to work without special drivers.

Can it achieve full gigabit on all four ports at once?
It can handle heavy traffic, but peak simultaneous 4x1Gb performance depends on the host CPU, PCIe slot bandwidth, and system configuration, so some setups may not reach full wire speed on all ports.

Does it fit small form-factor PCs?
Yes. The package includes a low-profile bracket so the card can be installed in compact cases as well as standard towers.