It would help to understand the Logic behind this...

For what its worth, Vegas Pro allows this preview during render, of course, if the render is fast, so is the preview.

I've installed the RTX 3060Ti, so far no issues.

Thanks Dave.

I'm looking to replace the smallish Quadro K620. I don't want to spend Quadro $$ at this point. Anyone with experience?

Are you using the SxS Memory cards, or importing via usb cable? I imported some EX-1R footage MPEG 2 35mbs MPEG 4 wrapper into Vegas Pro 20 last week. (Win 10 22H2)

I am not Mac aware, I would suggest turning off any programs running in the background, dissabling any power budget schemes. Usually due to programs competing for system resources.

Try a different keyboard and mouse. I've seen more than one instance of them causing mayhem.

Nicest Guy on the forum.

I'm in the process of repacking some Hi8 and HDV legacy items myself.