Plex Media Player playback performance

Greetings,

First things first, I have an old PC that I use for one of my frontends. It’s an Intel Atom processor with built an nVidia GPU. I used Plex Home Theatre on it for a very long time, and switched to Plex Media Center. Unfortunately, some of the playback performance when using PMC is too poor to watch, and I have to revert to PHT.

Here’s an example using PMC:
https://goo.gl/photos/hqWTBSz7HMbW2a8i9

And here’s the same video using PHT:
https://goo.gl/photos/1vraadaNSTgB6anv8

Any suggestions are welcomed!

Thanks!