I have GWX 2 set up on a laptop (don't ask me why) and so I can't run with all the bells and whistles either.
I think you'll find if you use the lite harbour traffic and don't go for the 16k visibility, you should be fine.
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"I wish to have no Connection with any Ship that does not Sail fast for I intend to go in harm's way." - Captain John Paul Jones, 1778
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