For months now, I have struggled to get smooth video to play back in Sony Vegas Pro while trying to edit. It's to the point where it often times just freezes up / locks up, and I have to do a restart of the software. The video, no matter what playback quality I choose, seems to just lag and freeze / strobe with no ability to troubleshoot this. Is there anyone that can please, please help me? I have a machine with 128 GB of video RAM, one of the best machines for editing up to 8K, but I cannot even use Sony Vegas to often times even play back HD video because of the lags, strobing, and locking up!