Windows 10: I can smoothly edit 4K video and play it without lag in Davinci Resolve which uses both...

I can smoothly edit 4K video and play it without lag in Davinci Resolve Studio 16 which uses both of my Nvidia graphics cards at around 96%. When I try to play an exported video back in Windows media player, VCL etc. windows only uses 1 of my graphics cards and always at 100%. How do I get windows 10 to use both graphics cards when playing a 4K video? I'm getting severe lag as a result making them unplayable. I know Windows can see both graphics cards since Davinci Resolve uses both. My VRAM is set to 4096mb. I also have 128 gigs of RAM which I'd also like to see windows use a lot more of. I r

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Davinci Resolve and H.265 videos

I have been using the free version of Davinci Resolve 16 to edit videos from my GoPro Hero 7 Black camera on a PC that is about 5 years old. I had installed the HEVC codec from the Microsoft Store and was able to process H.265 video with no problems. The
system was underpowered to process 4K video so I bought a new system. It is a Dell G5 with i9 CPU and an NVidia RTX 2070 Super GPU.

I installed the HEVC codec on the new system. Davinci Resolve does not recognize that the HEVC codec is available. When importing H.265 videos, Resolve shows "Media Offline" on the video clips. I have seen multiple videos that show installing the HEVC codec,
either the paid or free version from the Microsoft Store, enables Davinci to work correctly. I have uninstalled and reinstalled Davinci and the codecs My Windows 10 has all current updates installed. I have the latest version of the NVidia drivers and Davinci.

My new computer will play H.265 videos using the Windows Movie app and VLC.

One other difference between the two computers is that the old one is running the latest Windows Insider version. The latest insider version broke Davinci. It hangs at "Loading Fairlight Page". Prior to that version, it worked flawlessly.

I spoke with tech support for Davinci Resolve and was told that I had to get the full version and that the free version does not support H.265. I asked him why it worked on my old computer and on multiple other systems, as seen on Youtube and other forums.
He could not explain it and said that the free version does not include tech support so he couldn't elevate the issue.

Does anyone have any insight into this issue? Why would it work on a 5 year old system with an i3 CPU and an older NVidia GPU?

I really don't want to spend $299 for the paid version of Resolve when it appears that the free version should work.

 

video lag on 4k

can some one help me with this problem so i want to play a 4k video on my computer but is lagging and when i play a hd video it works fine this problem start wen i update my computer because it used to work fine with 4k videos please someone help me with
this problem

 

PC is lagging when I play 4K video

I’d like to play a 4k video on my PC but it is lagging. Although when
I play a HD video it works fine. I think that this problem appeared after the last update. Before that date when I updated my PC it had been working fine with 4k videos.