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Not unless you think 3% is worth it, for 4K you are better off waiting for the GTX 1080 beating Vega 10 cards.
Relative to the RX 480 and RX 470 then, the performance gains we’re seeing with the RX 580 and RX 570 are nothing spectacular, but then AMD has kept their promises similarly small. In practice this means that the RX 580 is only averaging 3% faster than the RX 480 it replaces in AMD’s product stack, while the RX 570 looks better, picking up 7% over the RX 470. Based on these numbers, I feel it’s fair to say that while both cards are faster than their earlier incarnations, I wouldn’t fault anyone for lumping the two generations of cards together. The small gains don’t enable the newer RX 500 cards to do anything the RX 400 cards couldn’t always do; though even a few percent can make all the difference in a game right on the bubble of sustaining 60fps.