GPU Upgrade delima

Jun 10, 2018
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I am currently running an xfx rx580 8gb and I’m looking for better performance should I add a second 580 and run a crossfire setup or just upgrade to Vega? What are the advantages and disadvantages of either or? I have a Ruben 5 1600x and Corsair 16gb 3000mhz ram in case that matters on the decision making.