Have the same video and ram but have an I5

To keep a solid 60fps I run at 1920x1080 capped to 60 Foliage and shadows on lowest settings motion blur and depth of field off. Max view distance.

Running with max shadows and foliage made it a bit choppy at times so I turned it down for better performance.

I have a bunch of world seeds saved but each one seems to be its own rendering, having multiple of the same seed should not impact anything at all.

Are you trying to host a server and play on it? Never tried that myself.

What settings do you use for graphics? Resolution? Capped frames?