Passthrough latency matters if you're playing on the captured screen
A capture card with poor passthrough can introduce noticeable input lag if you're viewing your gameplay through the card's passthrough output while playing. Low-latency passthrough is essential for console streaming setups where you play on the same display the capture feeds from.
Capture resolution and frame rate are a real limit, not just marketing
A card capped at 1080p60 capture will downscale a 4K or 120fps source even if your console/PC outputs higher — check the card's actual capture spec against your source's real output, not just its passthrough spec.
External (USB) vs. internal (PCIe) is a real tradeoff
External USB capture cards are portable and easy to move between PCs; internal PCIe cards typically offer lower latency and don't use a USB port, but require opening a desktop case and are effectively permanent in that machine.
Software compatibility affects your actual workflow
Check that the card is explicitly supported by the streaming/recording software you plan to use (OBS and similar) — driverless plug-and-play support varies by model and matters if you switch between multiple PCs often.
Do I need a capture card to stream from PC?
Not usually — PC games can typically be captured directly by streaming software without a separate card. Capture cards matter most for console gameplay, or for bringing a second PC's/device's video into your main streaming setup.
What's the difference between passthrough and capture resolution?
Passthrough is what gets sent to your monitor while you play; capture is what gets recorded/streamed. A card can support high passthrough resolution while capping capture lower — check both specs against what you actually need.
Internal (PCIe) or external (USB) capture card?
Internal PCIe cards generally offer lower latency and don't occupy a USB port, but require installing them inside a desktop case. External USB cards are portable and easier to set up, at a small latency cost.
