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Qnap 2PORT SFP28 25GBE NETWORK EXPANSION CARD LP PCIE GEN4X8 PCIE EXPANSION CARD LP PCIE GEN4X8 PCIE
- Model #: QXG-25G2SF-CX6
- $473.60 –
- More options from $473.60 - $529.14
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SYBA SY-VIA-GA 10/100/1000Mbps PCI Gigabit Network Card
- Standards: IEEE802.3ab IEEE 802.3x IEEE 802.1p IEEE 802.1Q
- Connectors: 1 x RJ45
- LEDs: Link, Activity
- Drivers: MS Widow server 2003/XP/NT/ME/2000/98SE, Read Hat Linux 7.3(kernel 2.4.18-3) or later, Novell Netware 4.2/5.x/6.x/ODI 1.11
- Model #: SY-VIA-GA
- $16.99 –
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- $151.99 –
- More options from $25.49 - $550.26
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6 Port 2.5 Gigabit PCI-e x4 Ethernet Network Card Realtek Chipset
- Class: 2.5G Ethernet Port
- Model #: SI-PEX24091
- $91.34 –
- More options from $91.34 - $102.94
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- Parts: 30 Days
- Labor: 30 Days
- Model #: 817749-B21-REF
- $28.99 –
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Low Profile Bracket for Intel X710-DA2
- Model #: B07KNMHXMG
- $18.99 –
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10Gb PCIe NIC Network Card, Single RJ45 Port, Aquantia AQC107 4X Ethernet LAN Controller, for Windows Server/Windows/Linux/ESX
- Model #: 69089009077
- $39.99 –
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- Part Number: MCX755106AC-HEAT
- Model #: MCX755106AC-HEAT
- $1,960.90 –
- More options from $1,960.90 - $2,577.00
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StarTech.com 1 Port PCI Express PCIe Gigabit Network Server Adapter NIC Card - Dual Profile
- Standards: IEEE 802.3, IEEE 802.3u, IEEE 802.3x, IEEE 802.3ab
- Connectors: 1 x RJ45
- LEDs: Link/Activity (Green) Gigabit Detect (Yellow)
- Temperature: Operating Temperature: 0°C to 70°C (32°F to 158°F) Storage Temperature: 0°C to 100°C (32°F to 212°F)
- Model #: ST1000SPEX2
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StarTech PEX10GSFP4I StarTech.com SFP+ Server Network Card - 4 Port Nic Card - Intel XL710 Chip - PCIe Netword Card - 10 Gigabit Ethernet Card
- Standards: IEEE 802.3ae (10GBASE-LR/SR only) PCI Express Rev 3.0, using PCIe x8 (or higher) slot
- Connectors: Connector Type (s): 1 x PCI Express x8 Male Internal Ports: 4 x SFP+ Slot Female
- LEDs: 4 - Link / Activity (green)
- Temperature: Operating Temperature: 5 ~ 50 degree Celsius (41 ~ 122 degree Fahrenheit) Storage Temperature: -20 ~ 60 degree Celsius (-4 ~ 140 degree Fahrenheit)
- Model #: PEX10GSFP4I
- $557.99 –
- More options from $557.99 - $670.97
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10Gtek 10Gb Ethernet Network Card with Broadcom BCM57810S Chip, PCIe X8 Card, Dual SFP+ Port Adapter ,with 2 PCS 10GBase-SR SFP+ Transceiver
- Connectors: 2 x SFP+
- Drivers: Included
- Temperature: 0°C ~ 55°C
- Features: 57810s 10g 2s x8
- Model #: 57810S-10G-2S-X8+AXS85-192-M3 (x2)-CSC-X
- $79.99 –
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StarTech.com USB-C to Ethernet Adapter with 3-Port USB 3.0 Hub and Power Delivery - USB-C GbE Network Adapter + USB Hub w/ 3 USB-A Ports
- Standards: IEEE 802.3, IEEE 802.3u, IEEE 802.3ab USB 3.0 - Backward compatible with USB 2.0 and 1.1 IEEE 802.3az Energy-Efficient Ethernet, IEEE 802.3x Flow Control, 802.1q VLAN Tagging, 802.1p Layer 2 Priority Encoding
- Connectors: 1 x RJ45
- Temperature: Operating Temperature: 0 ~ 45 degree Celsius (32 ~ 113 degree Fahrenheit) Storage Temperature: -10 ~ 70 degree Celsius (14 ~ 158 degree Fahrenheit)
- Humidity: 10~90% RH (Non-condensing)
- Model #: US1GC303APD
- $71.99
- $57.99 –
- Save: 19%
- More options from $57.99 - $65.41
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StarTech.com AC600 Wireless-AC Network Adapter - 802.11ac, PCI Express - Dual Band 2.4GHz and 5GHz Wireless Network Card
- Part Number: PEX433WAC11
- Dimensions: Height: 0.9" Width: 3.8" Depth: 4.8"
- Weight: Weight (Approximate): 1.70 oz
- Package Contents: AC600 Wireless-AC Network Adapter - 802.11ac, PCI Express Driver CD Low Profile Bracket Quick Start Guide
- Model #: PEX433WAC11
- $60.99
- $55.99 –
- Save: 8%
- More options from $26.74 - $71.00
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StarTech.com USB 3.0 to Gigabit Ethernet Adapter NIC w/ USB Port - Black
- Standards: IEEE802.3, IEEE802.3u, IEEE802.3ab
- Connectors: 1 x RJ45
- Dimensions: 5" x 1.4" x 0.7"
- Weight: 1.5 oz [42 g]
- Model #: USB31000SPTB
- $45.99 –
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StarTech.com 2-Port 2.5G NBASE-T PCIe Network Card, Intel® I225-V, Dual-Port Ethernet, Multi-Gigabit NIC
- Part Number: PR22GINETWORKCARD
- Package Contents: 2-Port 2.5GBase-T Ethernet Network Adapter Card - PCIe 2.0 x2 1 x Low Profile Bracket 1 x Quick-Start Guide
- Model #: PR22GINETWORKCARD
- $157.64 –
- More options from $102.65 - $167.58
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- Connectors: 4 x SFP+
- Weight: 0.4
- Model #: X710DA4FHBLK
- $425.01
- $368.99 –
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- More options from $368.99 - $889.36
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StarTech ST3300U3S USB 3.0 to Gigabit Ethernet NIC Network Adapter with 3 Port Hub - White
- Standards: IEEE 802.3, IEEE 802.3u, IEEE 802.3ab, IEEE 802.3az USB 3.0 rev. 1.0
- Connectors: 1 x RJ45
- LEDs: 1 - Blue - Power 1 - Green - Network Link (solid) / Activity (flashing)
- Wake On LAN: Yes
- Model #: ST3300U3S
- $61.30 –
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StarTech.com Mini PCI Express Gigabit Ethernet Network Adapter NIC Card
- Standards: IEEE802.3, IEEE802.3u, IEEE802.3ab
- Connectors: 1 x RJ45
- LEDs: 1 - Activity 1 - Link
- Wake On LAN: Yes
- Model #: ST1000SMPEX
- $29.99 –
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StarTech.com PCI Express (PCIe) Gigabit Ethernet Multimode SC Fiber Network Card Adapter NIC - 550m
- Dimensions: Height: 4.6" Width: 0.7" Length: 4.7"
- Weight: Weight (Approximate): 2.30 oz
- Package Contents: 1 Port PCI Express Gigabit Fiber Network Card 1 x Low Profile Bracket 1 x Driver CD 1 x Instruction Manual
- Model #: PEX1000MMSC2
- $211.99
- $189.99 –
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StarTech.com 4-Port PCI Express Gigabit Network Adapter Card, Quad-Port PCIe Gigabit NIC
- Standards: Compliant with IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
- Connectors: 1 - PCI Express x4 Male
- Temperature: Operating Temperature: 0 degree C to 55 degree C (32 degree F to 131 degree F) Storage Temperature: -40 degree C to 75 degree C (-40 degree F to 167 degree F)
- Humidity: 5 % ~ 95 % (Non-condensing)
- Model #: ST1000SPEX43
- $183.99
- $162.99 –
- Save: 11%
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- Connectors: 1 x 10GBase-LR
- Weight: 0.1
- Parts: Lifetime limited
- Labor: Lifetime limited
- Model #: E10GSFPLR
- $25.99 –
- More options from $25.99 - $132.25
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StarTech.com USB-C to Ethernet Gigabit Adapter - Thunderbolt 3 Compatible - USB Type C Network Adapter - USB C Ethernet Adapter
- Connectors: 1 x RJ45
- LEDs: 1 x 1 - 10/100 Link/Activity (Green) 1 x Gigabit Link/Activity (Amber)
- Temperature: 0°C ~ 50°C
- Humidity: 5% ~ 80% RH
- Model #: US1GC301AU
- $49.99 –
- More options from $49.99 - $55.93
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StarTech.com 4 Port Gigabit Power over Ethernet PCIe Network Card - PSE / PoE PCI Express NIC
- Weight: 0.8
- Package Contents: 4 Port Gigabit Power over Ethernet PCIe Network Card - PSE / PoE PCI Express NIC 1 x Driver CD 1 x Instruction Manual
- Model #: ST4000PEXPSE
- $322.99 –
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StarTech.com USB 3.0 to Fiber Optic Converter - USB to Open SFP Adapter - Gigabit Network Adapter Multi Mode (MMF)/Single Mode Fiber (SMF)
- Standards: IEEE 802.3z 1000BASE-SX/LX IEEE 802.1Q VLAN tagging
- Connectors: Connector Type (s): 1 x 9 pin USB 3.0 A Female External Ports: 1 x SFP Slot Female
- Wake On LAN: Yes
- Temperature: Operating Temperature: 0 ~ 60 degree Celsius (32 ~ 140 degree Fahrenheit) Storage Temperature: -10 ~ 70 degree Celsius (14 ~ 158 degree Fahrenheit)
- Model #: US1GA30SFP
- $250.99 –
- More options from $250.99 - $264.86
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StarTech.com PEX40GQSFPI QSFP+ Server Network Card - PCIe 40Gbps - Converged Fiber NIC Adapter - Intel XL710 Chip (PEX40GQSFPI)
- Type: QSFP+ Server Network Card
- External Ports: 1 - QSFP+ Female
- Internal Ports: 1 - PCI Express x8 Male
- Standard: IEEE 802.3ba 40GBASE-SR4 IEEE 802.3ba 40GBASE-LR4 PCI Express Rev 3.0, using PCIe x8 (or higher) slot
- Model #: PEX40GQSFPI
- $448.99 –
- More options from $42.91 - $529.43
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StarTech 4-Port Gigabit Ethernet Card P041GINETWORKCARD
- Model #: P041GINETWORKCARD
- $300.00
- $256.99 –
- Save: 14%
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Allied Telesis AT-2711FX/ST-901 100Mbps PCI-Express Network adapter
- Connectors: 1 x ST
- BUS: 32-bit PCI
- Weight: 20
- Parts: Lifetime limited
- Model #: AT-2711FX/ST-901
- $209.00
- $179.99 –
- Save: 13%
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- Brand: Intel
- Part Number: X710T2LOCPV3
- Features: General RJ45 connections over CAT5e, CAT6, CAT6A cabling Energy Efficient Ethernet (EEE) Load balancing on multiple CPUs Protect, Detect and Recover Support for most network operating systems Time Sync (IEEE 1588*, 802.1as) OCP NIC 3.0 adapter Adapter features Data Rate Supported Per Port : 10/5/2.5/1Gbps and 100Mbps Bus Type/Bus Width: PCIe 3.0 x8 Interrupt Levels: INTA, MSI, MSI-X Hardware Certifications: FCC A, cULus, CE, VCCI, BSMI, RCM, KCC, EEE Controller: Intel® Ethernet Controller X710-AT2 (Dual Port)
- Model #: X710T2LOCPV3
- $259.99 –
- More options from $259.99 - $756.39
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StarTech.com 1-Port 2.5GbE M.2 2280 Network Card, NBASE-T PCIe Ethernet Card, Intel I225-V, Multi-Gigabit Desktop NIC/LAN Card, TAA
- Part Number: MR12GI-NETWORK-CARD
- Dimensions: Height: 0.6" Width: 3.1"
- Weight: Weight (Approximate): 0.50 oz
- Package Contents: 2.5Gigabit Ethernet Adapter 1 x CAT6 Cable Adapter 1 x Full-Profile Bracket 1 x Low-Profile Bracket 1 x M3x2 Screw 1 x QuickxStart Guide
- Model #: MR12GI-NETWORK-CARD
- $79.99 –
- More options from $79.99 - $97.99
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Lenovo ThinkPad Ethernet Extension Adapter Gen 2
- Part Number: 4X90Q84427
- Features: Product Type:Ethernet Card
- Weight: 0.05
- Model #: 4X90Q84427
- $41.99 –
- More options from $18.39 - $84.99
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- Brand: NVIDIA
- Part Number: MCX713104AC-ADAT
- Interface: PCI Express Gen 4.0: SERDES @ 16GT/s, x16 lanes (4.0 and 3.0 compatible) Networking Port: Quad-port SFP56 Ethernet (copper and optical)
- Features: Protocol Support: Ethernet Protocols supported by the electrical interface 50GAUI-2 C2M, 50GAUI-1 C2M, 50GBASE-CR, 50GBASE-R2 , 40GBASE-CR4, 40GBASE-R2, 25GBASE-R, 10GBASE-R, 10GBASE-CX4, 1000BASE-CX, CAUI-4 C2M, 25GAUI C2M, XLAUI C2M , XLPPI, SFI Capabilities: Secure Boot Enabled, Crypto Enabled Electrical and Thermal Specifications Voltage: 12V, 3.3VAUX Maximum current: 100mA Typical power with passive cables in PCIe Gen 4.0 x16: 15.8W
- Model #: MCX713104AC-ADAT
- $1,460.00
- $1,257.99 –
- Save: 13%
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- $114.99 –
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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
11/17/2025 9:14:36 AM
Excellent performance
“ Drivers can be found at: downloadcenter.intel.com Select "Active Products" => "Network Connectivity" => "Intel Desktop Adapters" => "Intel Pro/1000 GT adapter". ”
Intel EXPI9301CTBLK Network Adapter 10/100/1000Mbps PCI-Express 1 x RJ45Brandon Y.
6/21/2023 11:48:57 AM
Works as advertised
“ -Works without dropping connection (unlike like my onboard intel wired network adapter). ”
TP-Link TX201 Interface Cards 2.5Gbps PCI-Express 1 x RJ45