I just built a new computer with 20 cores and svp13 only see's 16 cores. Is there a limit to how many cores it see's? All my other programs see the correct amount.

I was not aware Vegas listed the number of cores a machine has. Logical or physical physical cores. Vegas does have a video preference for the maximum number of threads to use. That preference seems to have an arbitrary limit of 16 regardless of logical/physical cores in the system. My guess is that is what you are referring to.