Quote I do wonder if the difference is that PD software favors Intel CPUs over AMD.

That's what I am thinking too. Cyberlink support still hasn't got a solution. PD is a real dissapointment. I have spend hours to get PD working, but nothing seems to help.

The preview is really terrible and useless when I want to edit a video. Really giving up and asked for a refund.

Hopefully an update of PD will solve this issue in the future.

Quote The Op states that his laptop with an i5-6300u mobile cpu of 2 core/4 thread runs PD smoother than his amd 8 core/16 thread cpu desktop. There is about a 7X passmark difference. Shadow files are finished and are used in the screen recording. The clip on the timeline is 9.5 seconds long. It does show a choppy display when scrubbing when compared to the filmora screen recording.

Place the PD365 Mountainbiker sample clip on the timeline, expand the scale, scrub back and forth and see a much smoother display and scrolling effect like much of his filmora screen recording. Do not have shadow files enabled. I do wonder if the difference is that PD software favors Intel CPUs over AMD.

In my view, probably a big stretch to think PD software favors Intel CPUs over AMD based on anything in this thread. The statement may or may not be true, I have no PD specific coding insight to judge.

In this case, the scrubbing a timeline moving around randomly like that with PD is very video access point dominate and then the decode of the video for display. As mentioned prior, definitely not a PD strong point, too much timeline playback latency. Not surprising other codes dominate smoothness, it's been a PD need for years and echoed in the forum multiple times on poor timeline fluidity.

Overall raw CPU power really not really required for this task so drawing passmark comparisons won't tell the story. However, in this case a iGPU can be very advantageous vs a discrete GPU as no transfer of data over PCIe bus required to display. The iGPU has instant access to the read data as one randomly scrubs a timeline as it shares the same memory bank of the CPU doing the data read. My guess this benefit simply masks PD poor timeline performance and could make an iGPU more attractive for this scrubbing case.

In my view, if one would want to make an Intel vs AMD comparison for this PD scrubbing task, one should probably try to compare similar performance iGPU/CPU core count combos from the two manufacturers combined with similar fast I/O hardware.

Jeff