I bought the vegas pro 14 in a steam promotion, but when i put the gpu acceleration option it only appears "off" and i will check the gpu before rendering it appears CUDA is evaluable! How to solve this problem? i have a gtx 1070 ti
There is no core difference among VP 14 "editions." Either it works with your GPU or not.
Update support for VP14 was discontinued a few years ago. Other owners of your card may know some tricks, but I wouldn't hold out hope of much improvement.