The video card will affect your live broadcast in many ways. First, it visually affects your flow. If you are using a low-end GPU, you must turn down the graphics settings for the game. In addition, you may not be able to reach 60 frames per second, which will adversely affect your flow. If you have a better GPU, you will be able to achieve the target frame rate of 60 and increase the in-game settings, which will have a beneficial impact on your audience.
Finally, the Series RTX GPUs or newer GPUs can also encode your video for your streams, which can offload some workload from your CPU and produce more stable streams.
Choose a suitable video card streaming server for live broadcast based on GPU specifications.