What Is a Capture Card and Do You Need One for Streaming?

What Is a Capture Card?

A capture card is a piece of hardware that takes a video signal — from a game console, second PC, or camera — and inputs it into your gaming PC for recording or streaming. It converts the HDMI or component signal into a digital format your streaming software (OBS, Streamlabs) can process.

Do PC Gamers Need a Capture Card?

For most PC gamers who stream their own PC gameplay: no. Your GPU can both render the game and encode the stream simultaneously. Modern NVIDIA GPUs have NVENC encoding hardware that handles streaming without impacting game performance. You need a capture card if:

• Streaming from a PlayStation, Xbox, or Switch to your PC
• Using a dual-PC streaming setup (one PC for gaming, one for encoding/streaming)
• Recording from a camera for a facecam without using USB capture

Internal vs External Capture Cards

Internal (PCIe): Installs in a PCIe slot. AVerMedia Live Gamer 4K, Elgato 4K60 Pro. Zero USB bandwidth overhead. Better for high-resolution, high-frame-rate capture. External (USB): Elgato HD60 X, AVerMedia Live Gamer Ultra. Plug-and-play, no PCIe slot needed. USB 3.0 bandwidth limits the maximum capture resolution/framerate.

GPU Encoding vs CPU Encoding

For PC-only streaming, use NVIDIA NVENC (or AMD VCE / Intel Quick Sync) for encoding:

• NVENC H.264 or H.265 produces excellent quality at near-zero CPU overhead
• CPU encoding (x264) produces higher quality at a given bitrate but consumes 30–50% of CPU at gaming-appropriate quality levels

MrGameFix optimization includes OBS and streaming software configuration as part of the Remote Hands-On Session service.