A capture card records video and audio from your gaming console or PC and sends it to your streaming software

A game capture card is a piece of hardware that sits between your gaming device and your computer (or works inside your computer). Its job is to take the video signal coming from your console or gaming PC, convert it into a format your streaming or recording software can use, and pass it through to your monitor and your streaming platform at the same time.

Think of it as a translator. Your PlayStation, Xbox, or gaming PC outputs video in one format. Your streaming software on another computer (or the same one) needs that video in a different format to broadcast it live or save it as a file. The capture card does that translation in real time, with as little delay as possible.

Without a capture card, you would have to run your streaming software on the same computer you are gaming on, which slows down your game performance. A capture card lets you keep gaming smooth on one machine while another machine handles the broadcast.

Key Takeaways

  • A capture card converts video from a gaming console or PC into a format streaming software can broadcast or record.
  • External capture cards connect via USB or Thunderbolt, while internal cards install directly into a PC's expansion slot.
  • Using a capture card on a separate computer from your gaming device prevents your stream from slowing down your gameplay.
  • Capture cards vary in the video resolution and frame rate they support, from 1080p at 60 frames per second to 4K at 120 frames per second.
  • Most capture cards work with streaming software like OBS Studio, Streamlabs, or XSplit without additional setup beyond driver installation.

External versus internal capture cards

An external capture card connects to your computer through a USB port or Thunderbolt port. You plug one end into your gaming device (console or PC) and the other into your streaming computer. External cards are portable — you can move them between computers or take them to a friend's house. They work with Windows, Mac, and Linux. The trade-off is that USB connections have bandwidth limits, so external cards typically max out at 1080p resolution and 60 frames per second.

An internal capture card installs directly into an empty PCIe slot inside your gaming PC. It does not take up a USB port and can handle higher resolutions and frame rates because it connects directly to your computer's internal bus. The downside is that it only works on Windows PCs, it requires opening your computer case, and you cannot move it to another machine without reinstalling it.

Most streamers who are just starting out choose external cards because they are easier to set up and do not require opening a computer. Streamers who want to capture 4K video or very high frame rates often go internal.

How a capture card connects to your setup

The physical setup depends on whether you are capturing from a console or a PC. If you are streaming from a PlayStation or Xbox, you run an HDMI cable from the console to the capture card's input, then another HDMI cable from the capture card to your monitor. The capture card sits in the middle and copies the signal.

If you are capturing from a gaming PC, you have two options. You can use an external capture card the same way — HDMI from your graphics card to the capture card, then to your monitor. Or, if you have an internal capture card, you run HDMI from your graphics card directly to your monitor, and the internal card captures the video signal inside the computer without any extra cables.

Your streaming computer (the one running your broadcast software) connects to the capture card via USB or Thunderbolt. The capture card appears in your streaming software as a video source, just like a webcam would. You select it, and your software starts displaying the game video.

Resolution and frame rate: what the numbers mean

Capture cards are rated by the maximum resolution and frame rate they support. Resolution is the number of pixels on screen — 1080p means 1920 by 1080 pixels, 1440p means 2560 by 1440, and 4K means 3840 by 2160. Frame rate is how many individual images per second the card can capture, measured in frames per second (fps). A card rated for "1080p 60fps" can capture 1080 resolution at 60 frames per second.

Higher resolution and frame rate require more data to move through the connection. A USB 3.0 external card typically maxes out around 1080p 60fps. USB 3.1 and Thunderbolt cards can push 1440p 60fps or 4K 30fps. Internal PCIe cards can handle 4K 120fps because they have much more bandwidth.

For most streamers, 1080p 60fps is the standard. It looks sharp on a typical monitor and streams smoothly on platforms like Twitch. If you are streaming to a smaller audience or recording for personal use, 1080p 30fps is also common and uses less bandwidth.

Capture cards and streaming software

Once your capture card is connected and its drivers are installed, it shows up in your streaming software as a video input device. The most common streaming software — OBS Studio, Streamlabs, and XSplit — all recognize capture cards automatically. You do not need special plugins or configuration. You add a new video source, select your capture card from the list, and it appears on your stream.

Some capture cards come with their own software that adds extra features like built-in overlays, scene switching, or audio mixing. Elgato capture cards, for example, come with Stream Deck software that lets you control your stream with a physical button panel. But the basic function — capturing and streaming video — works with any standard streaming software.

Audio is usually captured along with the video through the same HDMI connection, so you do not need a separate microphone cable for game audio. If you want to add your own voice, you plug a microphone into your streaming computer and mix it in your software.

Why streamers use capture cards instead of streaming directly

A gaming PC powerful enough to run a modern game at high settings uses a lot of processing power. If you try to run your game and your streaming software on the same computer, the streaming software competes for CPU resources. Your game frame rate drops, your stream becomes choppy, or both. This is especially noticeable in demanding games like competitive shooters or new AAA titles.

A capture card lets you split the work. Your gaming computer focuses entirely on the game. Your streaming computer handles encoding the video and sending it to your platform. Each machine does one job well instead of both machines doing two jobs poorly.

Consoles like PlayStation and Xbox cannot run streaming software at all — they have no way to install third-party applications. A capture card is the only way to stream console gameplay to Twitch or YouTube.

Common capture card brands and what to expect

Elgato (owned by Corsair) makes the most popular capture cards for streamers. Their Cam Link and HD60 lines are external USB cards that work with Windows and Mac. Their 4K60 Pro is an internal PCIe card for high-resolution streaming. Elgato cards tend to be more expensive but come with good software and are widely supported by streaming platforms.

AVerMedia makes capture cards at various price points, from budget USB cards to high-end internal cards. Their Live Gamer series is common among console streamers. Blackmagic Design makes professional-grade capture cards used in broadcast studios and by streamers who need very low latency (delay).

Most capture cards in the mid-range price bracket perform similarly — they capture 1080p 60fps reliably and work with all major streaming software. The differences are in software features, build quality, and support. Buying the most expensive card does not may provide a better stream if your internet connection or computer is the bottleneck.

Frequently Asked Questions

Do I need a capture card if I am streaming from my gaming PC?

Not necessarily. If your PC is powerful enough to run both your game and streaming software without dropping frames, you can stream directly without a capture card. But if your frame rate drops when you start streaming, a capture card on a second computer will solve that problem. Consoles always need a capture card because they cannot run streaming software.

What is the delay between my game and what viewers see?

A capture card typically adds one to three frames of delay, which is less than 50 milliseconds at 60fps. Most viewers do not notice this. Your internet connection and streaming platform add much more delay — usually two to ten seconds. This is why you cannot read live chat during competitive gameplay; the chat is ahead of what you see on screen.

Can I use a capture card to record gameplay instead of streaming?

Yes. Your streaming software can save video to your hard drive at the same time it broadcasts. The capture card does not care whether the video is going to Twitch or to a file. Recording at 1080p 60fps uses about 10 to 15 gigabytes per hour of storage, so plan accordingly.

Do I need special cables for a capture card?

You need standard HDMI cables, which are inexpensive and widely available. Some capture cards come with HDMI cables in the box. Make sure your cables support the resolution and frame rate you want — older HDMI 1.4 cables may not handle 4K smoothly, but HDMI 2.0 or newer works fine for any consumer capture card.

What if my streaming computer does not have a USB 3 port?

USB 2.0 is too slow for video capture. If your computer only has USB 2.0 ports, you will need to add a USB 3 expansion card or use a Thunderbolt adapter if your computer has Thunderbolt. Most computers made in the last ten years have at least one USB 3 port, usually marked in blue.