You should be able to run it with better fps, I get around 140+ fps (my refresh rate is 144) on medium with I think around 448 render distance (I have a gaming laptop with the same ram amount but a worse graphics card than you). I think your problem is the mods, I have had massive frequent lag spikes when playing with mods that look like they shouldn't affect frames at all. From other forum posts I have seen it just seems to be a problem with VS mods in general leaking memory. From what I have seen, it looks like the fix is that if you want to play with mods, use a dedicated server (idk if the official VS servers support mods). What fps do you get if you run a world without mods enabled?
