My Plex server was running well until i tried updating it. During the the update it said something was wrong with the graphics card and it uninstalled itself. I didn't realize till later that i could've just redownload plex in the previous apps tab and it would've saved everything. So i reinstalled it and started again setting it up with the GPU pass through for video encoding. I've double checked everything and it all seems right. Plex is able to recognize my gpu but for whatever reason it doesn't use it for video encoding.