Is a genlock connection without a Quadro card just video input?

Development Platform & Builds XR Development
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1

If one has a genlock capable camera, only 1 render node/screen, a BM Decklink 8k pro, a camera tracking system, and an RTX 3090;

Does the sdi connection from the computer to the camera only act as a camera output to Unreal Engine because of the missing Quadro card? Therefore being equally as useful as an HDMI connection to an Elgato Cam Link?

And does any of this change if you’re using an HTC Vive camera tracking (not genlock capable) or a green screen set?

2

I am wondering the same. I know it is reviving a dead post, but no one responded.