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Adapter Cards

The term "adapter card" is a catch-all for any video, multimedia, I/O, or communications card. In the old days, these cards were used to provide extra ports or other specialized functions. These days, USB has taken over most of those roles, but there's still a market for adapter cards for things like connecting two monitors or adding FireWire. We've tested several and found some good options.

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  1. SANDISK - 256GB Creator microSD UHS-1 Memory Card with Adapter, Read Speeds up to 190MB/s, 3 Months of Adobe Lightroom Included

    SKU: JXJ62CR5RT

    Product Description

    A blue, water-resistant microSDXC card offering 256GB storage and up to 190MB/s read speeds.
    See all microSDXC
    Your price for this item is $79.99

  2. StarTech.com - Dual Port PCI Express Gigabit Ethernet PCIe Network Card Adapter

    SKU: J7PHY2VLQ2

    Product Description

    A dual-port PCIe adapter providing high-speed Gigabit Ethernet connectivity for enhanced network performance.
    See all All Wi-Fi & Networking
    Your price for this item is $173.97

  3. Startech - .com 2-Port PCI Express Serial Card with 16C1050 UART - RS232 - PCIe serial card with Dual Channel 16C1050 UART - 1 Pack - Green

    SKU: J7PHYX7R85

    Product Description

    A green PCI Express card that adds two high-performance RS232 serial ports to your computer.
    See all A/V Cables & Connectors
    Your price for this item is $65.85

  4. StarTech.com - PCI Express Wireless N Adapter - 300 Mbps PCIe 802.11 b/g/n Network Adapter Card - 2T2R 2.2 dBi

    SKU: J7PHY2VJXG

    Product Description

    A PCIe wireless network adapter card offering 300 Mbps speed and 2T2R 2.2 dBi antennas.
    See all All Wi-Fi & Networking
    Your price for this item is $38.99
    Save $11
    The previous price was $50.00

  5. Startech - 3 Port 2b 1a 1394 Mini PCI Express FireWire Card Adapter

    SKU: J7PHY2FFHR

    Product Description

    A Mini PCI Express adapter offering two FireWire-800 and one FireWire-400 ports for fast external connectivity.
    See all Cables & Connectors
    Your price for this item is $56.17
    Save $3
    The previous price was $59.62

  6. StarTech.com - USB to VGA Adapter - 1440x900 External Graphics Card

    SKU: J7PHY2FSVK

    Product Description

    A USB-to-VGA adapter that enables multi-monitor setups with external video support up to 1440x900 resolution.
    See all Monitor & Video Cables
    Your price for this item is $34.99

  7. Startech - Dual M.2 PCIe SSD Adapter Card - x8 / x16 Dual NVMe or AHCI M.2 SSD to PCI Express 3.0 - M.2 NGFF PCIe [m-key] Compatibl

    SKU: J7PHYXJW3Q

    Product Description

    A dual M.2 PCIe adapter card enabling high-speed NVMe or AHCI SSDs with RAID support and enhanced cooling.
    See all Cables & Connectors
    Your price for this item is $181.95

  8. StarTech.com - StarTech 2 Port PCIe RS232 Serial Adapter Card PEX2S953

    SKU: J7PHYXJ4LG

    Product Description

    A PCIe adapter card offering two RS232 serial ports for reliable computer connectivity and expansion.
    See all Computer Cards & Components
    Your price for this item is $60.33
    Save $0
    The previous price was $61.19

  9. Startech - 4-Port PCI Express RS232 Serial Adapter Card - PCIe Serial DB9 Controller Card 16950 UART - Low Profile

    SKU: J7PHYXJKGC

    Product Description

    A black PCIe card that adds four configurable RS232 serial ports for connecting legacy devices to your computer.
    See all Cables & Connectors
    Your price for this item is $134.70

  10. Broadcom - Dual-Port 10GBASE-T Ethernet PCI Express Gen3 x8 Network Interface Card - PCI Express 3.0 x8 - 2 Port(s) - 2 - Black

    SKU: JX8QFXX735

    Product Description

    A dual-port black PCIe Gen3 x8 network card delivering high-throughput 10GBASE-T Ethernet and hardware acceleration.
    See all USB Wi-Fi Adapters
    Your price for this item is $334.58
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FAQ

An adapter card is a hardware component that you install inside your computer to add new functionality or enhance existing features. Common types include graphics cards, sound cards, network cards, and USB expansion cards, allowing you to upgrade your system’s capabilities.

Popular types of adapter cards include graphics cards (GPUs), sound cards, network interface cards (NICs), Wi-Fi cards, Bluetooth adapters, USB expansion cards, and storage controller cards like SATA or NVMe adapters.

To ensure compatibility, check your computer’s available expansion slots (such as PCIe, PCI, or AGP), your operating system’s requirements, and the card’s supported features. Refer to your computer’s manual or motherboard specifications for detailed information.

Yes, as long as your motherboard has enough available expansion slots and your power supply can handle the additional load, you can install multiple adapter cards to expand your computer’s functionality.

Most adapter cards require drivers or software to function optimally. These drivers are usually provided by the manufacturer and can be downloaded from their website or included on a CD or USB drive with the product.