Computer Expansion Cards

Expand the capabilities of your computer with this wide selection of expansion cards. Whether you're looking to enhance your system's graphics, add more ports for connectivity, or boost its processing... power, we have the perfect solution for you. Browse through this range of expansion cards to take your computer to the next level and unlock its full potential for gaming, multimedia editing, or professional applications.
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Sonnet Echo Express SE IIIe Thunderbolt 3 Edition 3-Slot PCIE Card Expansion System

Sonnet Echo Express SE IIIe Thunderbolt 3 Edition 3-Slot PCIE Card Expansion System

SKU: SNEEXSE3ET3
(1)

DESCRIPTION

A compact, desktop Thunderbolt 3 to PCIe card expansion system that supports three professional PCIe cards simultaneously.

$799.99
$67 /mo suggested payments with 12‑month special financing. Learn how.
KEY FEATURES
  • Brand: sonnet

DESCRIPTION

A compact, desktop Thunderbolt 3 to PCIe card expansion system that supports three professional PCIe cards simultaneously.
StarTech PCI Express to 2 PCI & 2 PCIe Expansion Full Length Enclosure System, Includes PCI Expansion Box and PCI Express Card

StarTech PCI Express to 2 PCI & 2 PCIe Expansion Full Length Enclosure System, Includes PCI Expansion Box and PCI Express Card

SKU: STPEX2PCIE4L
(3)

DESCRIPTION

A PCI Express to 2 PCI & 2 PCIe Expansion Full Length Enclosure System for maximizing I/O capabilities.

$567.99
$95 /mo suggested payments with 6‑month special financing. Learn how.
KEY FEATURES
  • Brand: startech

DESCRIPTION

A PCI Express to 2 PCI & 2 PCIe Expansion Full Length Enclosure System for maximizing I/O capabilities.
Sonnet Echo Express SE I 1-Slot Thunderbolt 3 to Full-Height/Half-Length PCIe Card Expansion System

Sonnet Echo Express SE I 1-Slot Thunderbolt 3 to Full-Height/Half-Length PCIe Card Expansion System

SKU: SNEEXPSE1T3
(4)

DESCRIPTION

A Compact and lightweight Thunderbolt 3 expansion system that connects a PCIe card to computers without slots.

$369.99
$62 /mo suggested payments with 6‑month special financing. Learn how.
KEY FEATURES
  • Brand: sonnet

DESCRIPTION

A Compact and lightweight Thunderbolt 3 expansion system that connects a PCIe card to computers without slots.
Synology E10G18-T1 Single-Port, High-Speed 10GBASE-T/NBASE-T PCIe Expansion Card

Synology E10G18-T1 Single-Port, High-Speed 10GBASE-T/NBASE-T PCIe Expansion Card

SKU: SYE10G18T1
(3)

DESCRIPTION

A flexible and cost-effective PCIe expansion card for smooth migration to 10GbE networking with backward compatibility.

$139.99
KEY FEATURES
  • Brand: synology

DESCRIPTION

A flexible and cost-effective PCIe expansion card for smooth migration to 10GbE networking with backward compatibility.
Behringer X-LIVE 32-Channel SD Recording/Playback & USB Expansion Card for X32 Mixing Console

Behringer X-LIVE 32-Channel SD Recording/Playback & USB Expansion Card for X32 Mixing Console

SKU: BEXLIVE
(5)

DESCRIPTION

A powerful expansion card for the X32 mixing console, allowing for multi-channel recording and playback via USB and dual SD/SDHC slots.

$169.00
KEY FEATURES
  • Brand: behringer

DESCRIPTION

A powerful expansion card for the X32 mixing console, allowing for multi-channel recording and playback via USB and dual SD/SDHC slots.
Sonnet Allegro USB-C 4-Port USB 3.1 Gen 2 PCIe Card with Dual 10Gb Controllers, Thunderbolt Compatible

Sonnet Allegro USB-C 4-Port USB 3.1 Gen 2 PCIe Card with Dual 10Gb Controllers, Thunderbolt Compatible

SKU: SNUSB3C4PME
(3)

DESCRIPTION

A high-performance USB-C 4-port PCIe card with dual 10Gb controllers and Thunderbolt compatibility.

$153.99
KEY FEATURES
  • Brand: sonnet

DESCRIPTION

A high-performance USB-C 4-port PCIe card with dual 10Gb controllers and Thunderbolt compatibility.
StarTech PCIe 1080p Video Capture Card for HDMI, DVI,VGA and Component Singles

StarTech PCIe 1080p Video Capture Card for HDMI, DVI,VGA and Component Singles

SKU: STPEXHDCAP2
(2)

DESCRIPTION

A PCIe capture card with HDMI, DVI, VGA, and component inputs for recording 1080p HD video and stereo audio.

$181.99
KEY FEATURES
  • Brand: startech

DESCRIPTION

A PCIe capture card with HDMI, DVI, VGA, and component inputs for recording 1080p HD video and stereo audio.
Axxon Parallel Port PCI Express Controller Card

Axxon Parallel Port PCI Express Controller Card

SKU: AXLF811KB
(1)

DESCRIPTION

A PCIe controller card that adds an EPP/ECP Parallel port for low and standard-height mounting brackets.

$199.95
KEY FEATURES
  • Brand: axxon

DESCRIPTION

A PCIe controller card that adds an EPP/ECP Parallel port for low and standard-height mounting brackets.
Axxon Native PCI Express (PCIe) 4S High Speed RS232 Serial Card Adapter with DMA & 12" Cable (HD44M to 4xDB9M)

Axxon Native PCI Express (PCIe) 4S High Speed RS232 Serial Card Adapter with DMA & 12" Cable (HD44M to 4xDB9M)

SKU: AXLF1088KB

DESCRIPTION

A Native PCIe 4S RS232 Serial Card Adapter with high speed and DMA technology.

$199.95
KEY FEATURES
  • Brand: axxon

DESCRIPTION

A Native PCIe 4S RS232 Serial Card Adapter with high speed and DMA technology.
Sonnet Thunderbolt 3 Upgrade Card for Echo Express III-D & III-R Expansion System

Sonnet Thunderbolt 3 Upgrade Card for Echo Express III-D & III-R Expansion System

SKU: SNUPGRTB3E3

DESCRIPTION

A Thunderbolt 3 upgrade card for Echo Express Thunderbolt 2-to-PCIe card expansion systems, providing increased bandwidth and easy installation.

$199.99
KEY FEATURES
  • Brand: sonnet

DESCRIPTION

A Thunderbolt 3 upgrade card for Echo Express Thunderbolt 2-to-PCIe card expansion systems, providing increased bandwidth and easy installation.
Accusys ThunderBox Four Port PCIe 3.0x4 Expansion Box

Accusys ThunderBox Four Port PCIe 3.0x4 Expansion Box

SKU: ACCTHUNDERBX

DESCRIPTION

A PCIe 3.0 expansion box with 4 ports, ThunderBox increases workstation numbers and expands storage capacity.

$699.00
$117 /mo suggested payments with 6‑month special financing. Learn how.
KEY FEATURES
  • Brand: accusys

DESCRIPTION

A PCIe 3.0 expansion box with 4 ports, ThunderBox increases workstation numbers and expands storage capacity.
Behringer WING Expansion Card for 64x64 Channel Audinate Dante AoIP Networking

Behringer WING Expansion Card for 64x64 Channel Audinate Dante AoIP Networking

SKU: BEWINGD

DESCRIPTION

A 64-channel bi-directional audio interface for seamless integration with Dante enabled IP networks.

$559.00
$94 /mo suggested payments with 6‑month special financing. Learn how.
KEY FEATURES
  • Brand: behringer

DESCRIPTION

A 64-channel bi-directional audio interface for seamless integration with Dante enabled IP networks.
Axxon 1 Port Parallel PCI Express Controller Card

Axxon 1 Port Parallel PCI Express Controller Card

SKU: AXLF652KB

DESCRIPTION

A low-profile PCI Express card that adds an EPP/ECP Parallel port to your computer.

$199.95
KEY FEATURES
  • Brand: axxon

DESCRIPTION

A low-profile PCI Express card that adds an EPP/ECP Parallel port to your computer.
Axxon Native PCI Express (PCIe) 1 Port RS232 Serial Card Adapter with DMA

Axxon Native PCI Express (PCIe) 1 Port RS232 Serial Card Adapter with DMA

SKU: AXLF1082KB

DESCRIPTION

A PCIe card adapter with 1 RS232 port and DMA capability from Axxon.

$39.95
KEY FEATURES
  • Brand: axxon

DESCRIPTION

A PCIe card adapter with 1 RS232 port and DMA capability from Axxon.
Axxon 8 Serial Port RS232 I/O Card

Axxon 8 Serial Port RS232 I/O Card

SKU: AXLF799KB

DESCRIPTION

A cutting-edge 8 serial port adapter for PCIe expansion slots, with high-speed 16C950 UART and plug & play compatibility.

$299.95
$50 /mo suggested payments with 6‑month special financing. Learn how.
KEY FEATURES
  • Brand: axxon

DESCRIPTION

A cutting-edge 8 serial port adapter for PCIe expansion slots, with high-speed 16C950 UART and plug & play compatibility.
Sonnet Thunderbolt 3 Upgrade Card for Echo Express SE I Expansion System

Sonnet Thunderbolt 3 Upgrade Card for Echo Express SE I Expansion System

SKU: SNUPGRTB3SE1

DESCRIPTION

A Thunderbolt 3 upgrade card for Sonnet's Echo Express Thunderbolt 2-to-PCIe card expansion systems, providing increased bandwidth and easy installation.

$199.99
KEY FEATURES
  • Brand: sonnet

DESCRIPTION

A Thunderbolt 3 upgrade card for Sonnet's Echo Express Thunderbolt 2-to-PCIe card expansion systems, providing increased bandwidth and easy installation.
Axxon 16 Port RS232 PCI Express Controller Card

Axxon 16 Port RS232 PCI Express Controller Card

SKU: AXLF729KB

DESCRIPTION

A 16-port RS232 controller card that adds multiple ports to your computer via PCIe slot.

$649.95
$109 /mo suggested payments with 6‑month special financing. Learn how.
KEY FEATURES
  • Brand: axxon

DESCRIPTION

A 16-port RS232 controller card that adds multiple ports to your computer via PCIe slot.
ClearOne CONVERGE Matrix 256x256 Dante Audio Channels Expansion Card for CONVERGE Matrix 256 EX Audio Mixer and Router

ClearOne CONVERGE Matrix 256x256 Dante Audio Channels Expansion Card for CONVERGE Matrix 256 EX Audio Mixer and Router

SKU: CO9103000003

DESCRIPTION

A Dante audio channels expansion card that increases the capacity of the CONVERGE Matrix 256 EX audio mixer.

$3999.00
$334 /mo suggested payments with 12‑month special financing. Learn how.
KEY FEATURES
  • Brand: clearone

DESCRIPTION

A Dante audio channels expansion card that increases the capacity of the CONVERGE Matrix 256 EX audio mixer.
Axxon 8 Port RS232 PCI Express Controller Card, Standard Height Mounting

Axxon 8 Port RS232 PCI Express Controller Card, Standard Height Mounting

SKU: AXLF662KB

DESCRIPTION

A PCI Express Controller Card that adds eight RS232 ports to your computer with standard-height mounting.

$599.95
$100 /mo suggested payments with 6‑month special financing. Learn how.
KEY FEATURES
  • Brand: axxon

DESCRIPTION

A PCI Express Controller Card that adds eight RS232 ports to your computer with standard-height mounting.
Axxon PCI Express (PCIe) 2 Port RS232 Serial Card Adapter with 36" Dualplex Cable (DB25M to 2xDB9M)

Axxon PCI Express (PCIe) 2 Port RS232 Serial Card Adapter with 36" Dualplex Cable (DB25M to 2xDB9M)

SKU: AXLF808KBQNX

DESCRIPTION

A PCIe card adapter with 2 RS232 ports and a dualplex cable for easy connectivity.

$99.95
KEY FEATURES
  • Brand: axxon

DESCRIPTION

A PCIe card adapter with 2 RS232 ports and a dualplex cable for easy connectivity.
StarTech USB Stereo Audio Adapter External Sound Card with SPDIF Digital Audio

StarTech USB Stereo Audio Adapter External Sound Card with SPDIF Digital Audio

SKU: STUSBAUDIO2D
(53)

DESCRIPTION

A compact USB audio adapter with S/PDIF digital output and 3.5mm analog audio/microphone connections.

Pros
  • Compatibility with MacOS Mojave
  • No hum
  • Affordable price
  • Easy installation
  • Improved sound quality
$45.99
KEY FEATURES
  • Brand: startech

DESCRIPTION

A compact USB audio adapter with S/PDIF digital output and 3.5mm analog audio/microphone connections.
Allen & Heath 64 Channel Dante Interface Card for iDR MixRack System

Allen & Heath 64 Channel Dante Interface Card for iDR MixRack System

SKU: AHAHMDANTEA
(1)

DESCRIPTION

A groundbreaking 64 channel Dante interface card for iDR MixRack system, providing high performance audio and routing flexibility.

$1499.00
$125 /mo suggested payments with 12‑month special financing. Learn how.
KEY FEATURES
  • Brand: allen & heath

DESCRIPTION

A groundbreaking 64 channel Dante interface card for iDR MixRack system, providing high performance audio and routing flexibility.
StarTech 3.5" Drive Bay IDE to Single CF SSD Adapter Card Reader

StarTech 3.5" Drive Bay IDE to Single CF SSD Adapter Card Reader

SKU: ST5BAYCF2IDE
(1)

DESCRIPTION

A compact and versatile IDE adapter that allows you to access CompactFlash and IBM MicroDrive media as an IDE hard drive.

$22.09
KEY FEATURES
  • Brand: startech

DESCRIPTION

A compact and versatile IDE adapter that allows you to access CompactFlash and IBM MicroDrive media as an IDE hard drive.
Klark Teknik 32-Channel ADAT Expansion Module for Midas and Behringer Digital Consoles

Klark Teknik 32-Channel ADAT Expansion Module for Midas and Behringer Digital Consoles

SKU: KTDN32ADAT

DESCRIPTION

A 32-channel ADAT expansion module with TOSLINK optical connectors for seamless integration with Dante enabled IP networks.

$96.90
KEY FEATURES
  • Brand: klark teknik

DESCRIPTION

A 32-channel ADAT expansion module with TOSLINK optical connectors for seamless integration with Dante enabled IP networks.
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Computer Expansion Cards

In the ever-evolving world of computer technology, expansion cards play a pivotal role in unlocking new levels of performance and versatility for both casual users and dedicated professionals. Whether you’re building a custom workstation from the ground up or breathing new life into an aging desktop, expansion cards offer a simple yet powerful way to tailor your system to your precise needs. As autumn arrives and many embark on new creative projects or prepare for the busy season ahead, upgrading with the right expansion card for your PC can make all the difference. From graphics cards that power immersive visual experiences to sound cards that deliver crystal-clear audio, and network cards that boost connectivity for seamless collaboration, these components allow you to customize your computing environment for everything from gaming and content creation to video editing and data analysis.

For photographers, videographers, and audio professionals, expansion cards are often the unsung heroes behind a smooth workflow. Imagine editing high-resolution images or 4K video footage without lag, thanks to a robust graphics or capture card, or achieving pristine sound quality in your studio with a dedicated audio interface. For those who rely on fast data transfer, storage expansion cards can dramatically speed up backups and file migrations—a crucial advantage when deadlines loom. Even hobbyists and home office users can benefit from the right expansion card, whether it’s upgrading to faster Wi-Fi for uninterrupted streaming or adding extra USB ports to connect all your essential devices. Expansion cards also make thoughtful, practical gifts for tech enthusiasts, students heading off to college, or anyone looking to get more out of their existing system. There’s a certain satisfaction in opening up a PC case, slotting in a new card, and instantly expanding the machine’s capabilities—an experience that’s as rewarding for seasoned builders as it is for first-time upgraders.

Selecting the ideal expansion card for your PC requires a bit of planning and consideration. Compatibility is key: always check your motherboard’s available slots and power requirements before making a purchase. Think about the tasks you perform most often—do you need more graphics power for rendering and gaming, additional ports for peripherals, or enhanced networking for remote work? The right expansion cards can transform your computer into a powerhouse tailored to your workflow. For those seeking to explore the full range of possibilities, our curated collection of PCI Cards offers solutions for virtually every need and application. As the days grow shorter and projects ramp up, now is an ideal time to upgrade your system and stay ahead of the curve. Whether you’re a creative professional, a student, or a passionate DIYer, the right expansion card is the key to unlocking your computer’s full potential.

Top Picks For Computer Expansion Cards