When CPU utilization is high and VGA utilization is low, does increasing RAM size affect video processing speed?

Hello, I am currently using TVAI and using 5950x, ddr4 cl18 16gb*2, 4090. When working with 4k video, CPU utilization is maintained at 85-95%, RAM utilization is maintained at 50-60%, and VGA utilization is less than 40%. In this situation, will the work speed significantly increase if the RAM size is 64GB or more?

The Ram size does not affect the speed if its big enought.

But the Ram speed (Mhz) will affect the speed of TVAI, but i dont know kow much.