What a video capture card does and why you need one

A video capture card is a device that records video and audio from an external source — a gaming console, camera, or another computer — and sends it to your PC so you can save it, stream it, or edit it. It sits between your video source and your computer, converting the signal into a format your PC can work with.

You need one when your computer doesn't have a built-in way to accept video input from another device. Laptops rarely have HDMI input ports; they have HDMI output only. A capture card bridges that gap. It's also useful if you want to record gameplay from a Nintendo Switch, PlayStation, or Xbox without running the game on your PC itself, or if you're capturing video from a camera or camcorder for editing.

Capture cards come in two main types: external USB cards that plug into your computer's USB port, and internal PCIe cards that install inside your desktop tower. USB cards are portable and work with any computer; PCIe cards are faster and don't use up a USB port, but they only work in desktops and require opening your case.

Key Takeaways

  • External USB capture cards work with any computer and need only a USB port and the right cables to connect your video source.
  • You must install capture software on your PC — the card itself is just hardware — and configure it to recognize the incoming video signal.
  • HDMI is the most common input, but older consoles and cameras may need adapter cables or composite/component input cards.
  • Your PC needs enough USB bandwidth and processing power; a USB 3.0 port is standard, and a modern multi-core processor handles 1080p60 without strain.
  • Once set up, you can record directly to your hard drive, stream to Twitch or YouTube, or route the video into OBS or other editing software.

Choosing between USB and internal PCIe capture cards

If you own a desktop computer and don't mind opening the case, a PCIe capture card is the faster choice. It connects directly to your motherboard's expansion slot and doesn't compete with other USB devices for bandwidth. Cards like the Elgato 4K60 Pro or AVerMedia Live Gamer 4K fit into a PCIe x4 or x16 slot. Installation means shutting down, removing the side panel, inserting the card, and restarting — a 15-minute job if you've done it before, longer if you haven't.

A USB capture card is simpler if you have a laptop or prefer not to open your desktop. It plugs into any USB 3.0 port (USB 2.0 works but is much slower) and works immediately without installation. Popular models include the Elgato Cam Link 4K, AVerMedia Live Gamer Portable 2 Plus, and Blackmagic Design Intensity Shuttle. The trade-off is that USB 3.0 bandwidth is shared with other devices on the same hub, so if you're also using an external hard drive or other high-speed USB device, performance can drop.

For most people starting out, a USB card is the right choice. You can move it between computers, return it if it doesn't work, and you don't risk damaging your motherboard during installation.

Connecting your video source to the capture card

The cable you use depends on what you're capturing from. Most modern gaming consoles and cameras output HDMI, so an HDMI cable runs from your console or camera to the HDMI input port on the capture card. The capture card then connects to your PC via USB (for external cards) or PCIe (for internal cards).

Older devices may need different cables. A PlayStation 2 or original Xbox uses composite video (three RCA cables: yellow for video, red and white for audio). A PlayStation 3 or early Xbox 360 may use component video (five cables: red, green, blue for video, plus red and white for audio). If your capture card doesn't have these ports built in, you'll need an adapter cable — search for "composite to HDMI converter" or "component to HDMI converter" on Amazon or B&H Photo. These adapters cost $15 to $40 and sit between your old console and the capture card's HDMI input.

Connect the audio separately if your capture card has a 3.5mm audio input jack. Some cards pull audio from the HDMI signal automatically; others require you to plug in a separate audio cable from your source device. Check your card's manual to see which applies.

Installing capture software and drivers on your PC

The capture card itself is just hardware. To actually record or stream, you need software. Most capture cards come with their own software — Elgato cards include Elgato Control Center, AVerMedia cards include RECentral, and Blackmagic cards include Media Express. Download the software from the manufacturer's website, not from the disc that came in the box, because the disc version is usually outdated.

Before installing the software, install the drivers first. Drivers are small programs that let your operating system recognize the capture card as a device. Again, download them from the manufacturer's website for your specific card model and your operating system (Windows 10, Windows 11, macOS, etc.). Run the driver installer, restart your computer, then plug in the capture card via USB or power it on if it's internal.

After the drivers are installed, install the capture software. Launch it and look for a settings or input menu. Select your capture card from the list of available devices. If the software doesn't see it, check that the USB cable is plugged in firmly, that you're using a USB 3.0 port (not a USB 2.0 port), and that the drivers installed without errors. Restart the software and try again.

Once the software recognizes the card, turn on your video source (console, camera, etc.) and you should see a live preview in the software window. If you see nothing, check that HDMI cables are connected on both ends and that your source device is actually outputting video.

Recording video directly to your hard drive

Most capture software has a big red Record button. Click it to start saving video to your hard drive. The software will ask you where to save the file and what format to use — usually MP4 or MOV. Choose a location with plenty of free space: 1080p60 video uses roughly 3 to 5 gigabytes per minute, so an hour of recording needs 180 to 300 gigabytes.

Before you hit Record, check the video settings in the software. Look for resolution (1080p, 1440p, 4K), frame rate (30 fps, 60 fps), and bitrate (the amount of data per second). Higher numbers mean better quality but larger files and more CPU load. For most purposes, 1080p60 at 10 to 15 Mbps bitrate is a good balance. If your PC struggles — you see dropped frames or stuttering — lower the bitrate or frame rate.

Click Record, let your video play, then click Stop when you're done. The software will save the file to your hard drive. Open it in a video player or video editing software like DaVinci Resolve, Shotcut, or Adobe Premiere to trim, add effects, or export in a different format.

Streaming to Twitch or YouTube using a capture card

If you want to stream live instead of recording, use OBS Studio (Open Broadcaster Software), which is free and works on Windows, macOS, and Linux. OBS doesn't come with your capture card; you download it separately from obsproject.com.

Launch OBS and go to Settings > Video. Set your base resolution to match your capture card's output (usually 1920x1080) and your output resolution to what you want to stream (also usually 1920x1080). Go to Settings > Output and set the bitrate to 6000 Kbps for Twitch or YouTube — this is a standard that works for most internet connections.

In the main OBS window, click the plus sign under Sources and select Video Capture Device. Choose your capture card from the dropdown. You should see a preview of your video source. If you don't, check that the card is plugged in and that OBS has permission to access it (on macOS, this means going to System Preferences > Security & Privacy > Camera and adding OBS to the list).

To stream to Twitch, go to Settings > Stream and select Twitch as the service. Log in with your Twitch account and OBS will fill in your stream key automatically. To stream to YouTube, select YouTube as the service instead. Click Start Streaming and OBS will begin sending video to your chosen platform. Viewers can find your stream on your channel page.

Troubleshooting common problems

If the capture card isn't showing up in your software, the most common cause is a driver issue. Uninstall the drivers from Control Panel > Programs > Programs and Features (on Windows) or Applications folder (on macOS), restart your computer, then reinstall the latest drivers from the manufacturer's website. If you're using a USB card, also try plugging it into a different USB 3.0 port — some ports on the same hub may share bandwidth with others.

If you see video but it's choppy or has dropped frames, your PC doesn't have enough processing power or USB bandwidth for the resolution and frame rate you've chosen. Lower the bitrate in your capture software, drop from 60 fps to 30 fps, or reduce the resolution from 1080p to 720p. Close other programs that use the CPU, like web browsers with many tabs open or background downloads. If you're using a USB card, make sure no other high-speed USB devices are plugged into the same hub.

If the audio is out of sync with the video, check that your audio cable is connected to the capture card's audio input (if it has one) and that the capture software is set to use that input. Some software has an audio sync adjustment in the settings — try shifting the audio forward or backward by 50 to 100 milliseconds to see if it lines up.

If the video looks washed out or has wrong colors, check the HDMI cable connection and try a different cable. Some cheap HDMI cables don't carry the full color range. Also check your capture software's color settings — there may be a brightness, contrast, or color space option you can adjust.

Frequently Asked Questions

Do I need a capture card if I want to record my PC screen?

No. If you're recording gameplay or applications running on your own PC, use OBS Studio or Windows 10/11's built-in Game Bar instead. A capture card is only needed when your video source is a separate device — a console, camera, or another computer — that you want to record on your main PC.

Can I use a capture card with a Mac?

Yes, but check the manufacturer's website first. Most USB capture cards work with macOS, but some older models or internal PCIe cards do not. Elgato, AVerMedia, and Blackmagic all make Mac-compatible models. Install the macOS drivers and software, and the process is the same as on Windows.

What's the difference between a capture card and a video converter?

A video converter changes the signal format (like HDMI to composite) but doesn't send it to a computer. A capture card does both: it converts the signal and sends it to your PC so you can record or stream it. If you just need to connect an old console to a modern TV, a converter is cheaper. If you want to record or stream, you need a capture card.

How much hard drive space do I need for recording?

1080p60 video uses roughly 3 to 5 gigabytes per minute depending on bitrate. An hour of recording needs 180 to 300 gigabytes. For long recording sessions, use an external hard drive connected via USB 3.0 to avoid filling your main drive. Make sure the external drive is fast enough — a 5400 RPM drive may drop frames; a 7200 RPM or SSD drive is safer.

Can I use a capture card to record from two sources at once?

Not with a single capture card — each card has one input. If you want to record two sources simultaneously, you need two capture cards, each connected to a different USB port or PCIe slot. Your software must support multiple inputs; OBS Studio does, but some manufacturer software does not. Check before buying a second card.