Before the color correction added in PS23 & 24, I could see using resolve to correct some clips.  But, I would still export the clips from resolve and edit my movie in PS.  Resolve just takes too many steps to create a timeline.  Maybe it's just my memory going, but I lose my creative thought process building a timeline in ...

I tried resolve.  Just didn't flow right for me.  Was frustrated with ps24 hangs and crashes in the new features and title editor, but resolve crashed just as much.  So, I stuck with ps.

I edited 4K 60fps video on an i7-6700k for several years.  I now use an i9-9900k.  While faster, they both worked fine.  I find it better to set the timeline to 1080p and make my project, then export your project in 4k.  Make sure you have at least 48gigs of virtual memory for exporting.

Then i would report the problem to the laptop manufacture.

Did you check the mb manufactures Web page for a bios update? Did you try setting the ngstudio and be renderer graphics to Nvidia and see if it exports?

Victorvideomaker had the same issue and had to set which GPU to use and performance or battery saving: http://forums.pinnaclesys.com/forums/post/804883.aspx 

In my Opinion, either windows or your bios is not letting PS18 use the Intel integrated graphics GPU, only the NVidia GPU.  You would be better using Intel GPU for PS18, it was much faster. See if you can follow the link below and set PS18 to use the Intel GPU rather than the NVidia GPU.  If Intel GPU doesn't show up in the list, then ...

Euphonograph:Any ideas, thanks, have a great weekend  Is this 18.1 or 18.5? Is it at least working now? If you need dolby 5.1, sounds like you're going to have to learn to live with it. 6 minutes to render a 60 minute clip isn't bad for a program that is six years old.

Those sound like average or peak frame rates, not constant.  If you don't trim the clip, some of the time it will work.  If you trim it and get the black frames or grey screen with circle arrow frames, sometimes you can just move the in or out point(frame) 1 or 2 frames either direction and it will work again.

You can use Mediainfo then click on view/tree and then scroll down to video to check the file framerate .  A lot of security cameras and cell phones use it to save file space, but it is next to impossible to edit on a timeline because the timeline has to be a fixed frame rate to do non-linear editing.