I would advise against dual Kingpin cards as they are for extreme overclocking (liquid nitrogen) and are not good value for anything else. A high end $1200-$1300 watercooler 2080ti will perform just as well for a much lower price. If you really wanna blow 4k on dual GPU's then I would get two Titan RTX. You could also opt for a HEDT chip like the 9940x pr even threadripper if you go for the cheaper 2080ti's.
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This will be multiple times faster than that for the same price.