Network Interface Cards (NICs) – Ethernet & Wireless

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Learn about Network Interface Cards (NICs)

Faster, More Reliable Wired Connectivity

A Network Interface Card gives your PC or server a fast, stable link to your network. From budget 1GbE to multi-gig (2.5GbE/5GbE) and 10GbE+, you’ll find PCI Express cards, USB adapters, and multi-port models in Newegg’s Network Interface Cards catalog. Pair your NIC with the right switch, optics, and cabling to unlock consistent throughput for gaming, low-latency streaming, content creation, virtualization, iSCSI backups, and more.

Popular NIC Categories

PCIe Ethernet Cards

The go-to choice for desktops and workstations. Options range from 1GbE and 2.5GbE to 10GbE/25GbE, with features like VLAN tagging, link aggregation (LACP), checksum/TSO/LRO offload, SR-IOV/RDMA, and PXE/Wake-on-LAN. Browse performance picks here: 10GbE network cards.

USB & USB-C Ethernet Adapters

Ideal for ultrabooks and mini PCs—plug-and-play wired networking without opening the case. Choose USB 3.0/USB-C for Gigabit and above. Find compact options in Network Adapters & Ethernet Connectors.

Fiber & SFP/SFP+ NICs

Use SFP/SFP+ for long-distance or electrically isolated runs and ultra-low latency. Pair your card with compatible optics from SFP/SFP+ transceivers and OM3/OM4 fiber for 10GbE and higher.

Key Decisions Before You Buy

Match the NIC to your target speed (1G, 2.5G, 5G, 10G, 25G), PCIe slot type (x1/x4/x8, Gen3/Gen4), and connector (RJ45 vs. SFP/SFP+). For fiber or long-run links, compare SFP+ fiber NICs. For copper installs, use the right cabling—see Ethernet cables (Cat6/Cat6a). If you’re wiring racks or tight spaces, confirm low-profile/half-height brackets and plan mounting with server racks & cabinets.

Performance tip: For 2.5GbE/5GbE over copper, Cat6/Cat6a reduces errors and heat. For 10GbE+ fiber, verify SR/LR optics and OM3/OM4 cable type. Power users should also check driver support for Windows, Linux, or VMware ESXi.

Typical Use Cases

Home & Gaming: Upgrade to a 2.5GbE PCIe card for faster downloads and smoother game/stream concurrency; pair with a 2.5G switch.

Creative & NAS: Move large media quickly with 10GbE PCIe NICs; use SFP+ for fiber runs to a rack or studio bay.

Virtualization & Labs: Choose dual-port/quad-port server NICs for VLANs, LACP, SR-IOV, and traffic isolation across hosts and services.

Why Add a Dedicated NIC?

Boosts wired speed and stability beyond onboard LAN, enables VLAN isolation and link aggregation, reduces CPU usage via hardware offloads, and adds flexibility for SFP/SFP+ fiber runs or multi-port redundancy and failover.

Frequently Asked Questions

Do I need 2.5GbE or is 1GbE enough?

1GbE is fine for basic browsing and streaming. If you copy large files, use fast NAS, or share bandwidth among many devices, 2.5GbE offers a noticeable speed boost—pair it with a compatible 2.5G switch.

RJ45 vs. SFP/SFP+ — which should I choose?

RJ45 over copper is convenient for short runs and existing cabling. SFP/SFP+ with fiber is better for long distances, lower latency, or electrical isolation. If you go fiber, match your card with the right optics from SFP/SFP+ transceivers.

Will a USB Ethernet adapter bottleneck my laptop?

Use USB 3.0 or USB-C models for Gigabit or faster speeds. They’re great for travel and thin-and-light PCs—browse options in Network Adapters & Ethernet Connectors.

Related Essentials

Build the whole stack: a multi-gig switch for uplinks, tidy runs with a patch panel, and protect your edge with firewalls & security.

Bestselling Network Interface Cards Reviews:

Anonymous

6/17/2025 11:09:06 PM

Card seems to work

“ In my analysis I concluded that the card is not counterfeit and that the card is a Dell card. ”

Intel Ethernet Converged Network Adapter X550, Backward compatible 10GBASE-T network adapter | X550T2

Michael

4/3/2025 6:07:50 PM

Solid network card

“ That's not at all a fault of the adapter itself, but might be important to know for anyone reading these reviews. ”

TP-Link 10/100/1000Mbps Gigabit Ethernet PCI Express, PCIE Network Adapter / Network Card / Ethernet Card for PC, Win10 supported (TG-3468)

Anonymous

12/23/2024 9:55:48 AM

Great item and value. Works Great.

“ Needed to replace the onboard network adapter. ”

2.5GBase-T PCIe Network Adapter, 2500/1000/100Mbps PCI Express Gigabit Ethernet Card RJ45 LAN Controller Support Windows Server/Windows, Standard and Low-Profile Brackets Included PCIe to 2.5 Gigabit

Julio Del Carpio

10/16/2024 4:45:05 AM

2.5 Gbps Network Card

“ Using this 2.5 GBPs Ethernet card (internal) your connection goes without restraints. ”

DERAPID 2.5Gbps PCI Express Network Adapter RJ45 to PCIE Card RTL8125 NIC 2.5G Gigabit LAN Gaming Network Card PCI-E x1 RJ45 NIC for Desktop

Anonymous

5/15/2024 7:24:58 AM

Does it's job

“ After my onboard internet connection went on the fritz, I purchased this NIC card based on Intels reputation and its reviews. ”

Intel Ethernet Server Adapter I210, Single-port Gigabit Ethernet server adapter for entry-level servers and audio-video applications | I210T1

Network Interface Cards

Featured Brands

SHOP BY Connectors

Learn about Network Interface Cards (NICs)

Faster, More Reliable Wired Connectivity

Popular NIC Categories

PCIe Ethernet Cards

USB & USB-C Ethernet Adapters

Fiber & SFP/SFP+ NICs

Key Decisions Before You Buy

Typical Use Cases

Why Add a Dedicated NIC?

Frequently Asked Questions

Do I need 2.5GbE or is 1GbE enough?

RJ45 vs. SFP/SFP+ — which should I choose?

Will a USB Ethernet adapter bottleneck my laptop?

Related Essentials

Bestselling Network Interface Cards Reviews: