Skip to contentGo to Product Search
Main Content
Best Buy

/

computer accessories & peripherals

/

monitor & screen accessories

/

monitor & video cables

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.

Read More
Results
Main Results

  1. j5create - USB to HDMI Multi-Monitor Adapter - White

    SKU: J36445RCQT

    Great device. Used my bonus points. Never a problem or issue with Best Buy....I love these kinds of adapters that makes life so much easier to connect all devices

    Product Description

    A white USB-to-HDMI adapter that enables multi-monitor setups with plug-and-play functionality for Windows and Mac.
    See all Monitor & Video Adapters
    Your price for this item is $29.99

  2. j5create - USB™ to HDMI™ Multi-Monitor Adapter, with 3.14" cable - White

    SKU: J36445R68L

    J5 adapters are the best...I love the J5 products, they never let you down. Self installs and works 100% of the time...Thank You BEST BUY!

    Product Description

    A white USB-to-HDMI adapter enabling multi-monitor setups with plug-and-play support for Windows and Mac.
    See all Monitor & Video Cables
    Your price for this item is $34.99

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

    SKU: J7PHY2FSVK

    Setup was simple, and my second monitor works great!

    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 $37.75
    Save $0
    The previous price was $37.89

  4. 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 $181.77

  5. 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 $6
    The previous price was $67.09

  6. 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 $129.16

  7. Eaton - Network Card-M3 - Remote management adapter - Gigabit Ethernet x 1 - Black

    SKU: J325G7Z5GH

    Product Description

    A black remote management adapter enabling Gigabit Ethernet connectivity for efficient network monitoring and control.
    See all All Wi-Fi & Networking
    Your price for this item is $297.75

  8. Allied Telesis - AT-2911SX Gigabit Ethernet Card

    SKU: J37HKPCR4K

    Product Description

    A high-performance gigabit Ethernet card designed for fast, reliable wired network connectivity.
    See all USB Wi-Fi Adapters
    Your price for this item is $306.53

  9. Allied Telesis - TAA GIG PCIE FIBER ADAPTER

    SKU: J37HKP297S

    Product Description

    A high-speed PCIe fiber adapter designed for reliable network connectivity in computers and workstations.
    See all USB Wi-Fi Adapters
    Your price for this item is $313.49
    Save $25
    The previous price was $338.49

  10. ASUS - PRIME NVIDIA GeForce RTX 5070 12GB GDDR7 PCI Express 5.0 Graphics Card - Black

    SKU: JJGGLH7TH6

    The best of the best is a graphics card, my son is very happy with his gift...I love it, is my best gpu in all my life, perfect for all!

    Product Description

    A high-performance black graphics card with 12GB GDDR7 memory, PCIe 5.0, and advanced cooling technology.
    See all GPUs / Video Graphics Cards
    Your price for this item is $819.99
1 - 10 of 10 items
10 items

Best Sellers

Related Pages

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.