We explain the best graphics card you can buy for gaming at 4K resolution, and other options for higher and lower budgets.

4K gaming used to break the bank. For years, 3840×2160 monitors cost a small fortune, and the ferocious graphics cards needed to drive a 4K display cost even more. That’s not even counting the price of the high-energy power supplies required to juice all that hardware.
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https://www.pcworld.com/article/3440264/the-best-4k-graphics-card-for-pc-gaming.html