When I join my server that's running on a Dell T410 with waiting for Minecraft to search for games on my local network, I see that I'm only getting ~30 fps.

I could not for the life of me figure out why I was getting that with my rig. Messing with settings with nvidia, changing the chunk distance, changing everything to its lowest graphical setting I was still only getting that same ~30 fps.

When I decided to add a server and add my local ip address of the T410, I was now getting the ~200+ fps. Imgur link is joining the server with the LAN option and the Server option.

I don't know what causes that and I could not find anything relating to my issue.

https://imgur.com/a/qA5ChMi