[Nathian Steir]

I know this thread is old, but I thought I would give it a try. I have Vegas Pro 12 and I recently am starting to have the lag issue when I apply filters etc. I have what I think is a pretty powerful computer. correct me if I am wrong. Intel I7-4820K @3.70ghz, 14GB Ram, Nvidia GE Force GTX 770. The only thing I know of is a recent graphics card driver update. Any thoughts on what it may be? Also, what I can upgrade? Thanks in advance.