I just need something that can encode DNxHD/ProRes faster and let me preview my 1080p timelines quicker. When tweaking Poita’s preview files in Sony Vegas, my 4770 / 635 couldn’t handle the footage unless it was in 8-bit/Video Gamma, as opposed to full 32-bit/Linear Gamma, which made my preview screen play back at ~8fps. Not sure if a GPU upgrade would fix this though.

I think if you run your display from a second GPU then it fixes screen lag. Of course I can’t speak from experience. 😃