PowerDirector 15 performs worse than that on my new Windows 10 64-bit, 6-core, 12-thread Intel Core i7 5930K Haswell-E/EP computer with SSD, 32GB RAM and NVIDIA GeForce GTX 1060 6GB graphics card.
In a project shot in full HD but with only one track of video clip material except for the occasional static image overlay or even less frequent video overlay, the video can't be played back in the timeline in any way that allows me to actually see what the video would look like. All audio cuts out for the full duration of every transition, and the video display freezes for most of that time and then "fast-forwards" to catch up with where the audio should be after the transition - just as the audio cuts back in. This happens even when I set video display to the lowest resolution.
If this continues, it will make PowerDirector pointless to use. If anyone has ideas on what can make PD15 so appalling when meanwhile the latest version of Premiere Pro functions without lag even on my 6.5-year-old i7 860, I'd really appreciate some guidance.