Dual PC Streaming NDI &
Capture Card Bandwidth Calculator
Calculate LAN bandwidth load, determine exact OBS audio sync offset delays, and eliminate dropped frames between gaming and streaming rigs.
โ๏ธ Dual PC Setup Configuration
๐ก Broadcast Network Engineer Verdict
Running 1080p60 over NDI 5 consumes ~130 Mbps of local LAN traffic. On a Gigabit wired network, this uses only 13.0% of available bandwidth, guaranteeing zero packet drops. Set your streaming PC microphone Sync Offset to +65ms to achieve frame-perfect lip sync.
Frequently Asked Questions
What is the difference between NDI and a hardware Capture Card for dual PC streaming?
A hardware capture card (like Elgato 4K60 Pro or HD60 X) captures video over HDMI with 0% network bandwidth usage and near-zero latency (~50ms-60ms fixed buffer). NDI (Network Device Interface) sends uncompressed or high-bitrate video over your local Ethernet router cable, saving the cost of a capture card but requiring a rock-solid Gigabit wired LAN connection (120-250 Mbps continuous stream).
Can I use NDI dual-PC streaming over Wi-Fi?
Never! NDI requires continuous uncompressed video packet throughput. Even on Wi-Fi 6, environmental packet loss and channel congestion will cause severe frame drops, audio desync, and stream stutter. Both your gaming PC and streaming PC must be hardwired with Cat 6 Ethernet cables to a Gigabit switch.
How do I fix audio sync delay between two streaming PCs?
Hardware capture cards and NDI both introduce 40ms to 90ms of video processing delay. In OBS on your Streaming PC, right-click the Audio Mixer > Advanced Audio Properties, and add a positive Sync Offset (typically 50ms - 80ms) to your microphone so your lips match your gameplay camera.