The best graphics cards are the rock star of the best gaming laptops and best gaming PCs for a reason. With the obsession amongst PC gamers, especially enthusiast builders, with having the very best hardware and cutting edge visuals (in large part, we admit, to shame our lowly console brethren), a killer GPU is less luxury and more necessity. While we don't want to discount the importance of building around one of the best CPUs for gaming, video cards will always hog the limelight with the way most games, particularly the latest and hottest triple-A titles, lean heavily into graphics rendering.
But picking the best graphics card is also a largely personal question, and figuring out which part is going to suit your lifestyle comes down to a number of factors. Did you just sink a bunch of cash into a beautiful 4K panel? You're going to need one of the top cards on the market to drive graphics at that resolution, something in the range of an RTX 2080 or 2080 Ti on the Nvidia side of the aisle, or perhaps AMD's top offering, the Radeon VII, if you're not fussed about having dedicated cores to handle ray tracing (or Nvidia's fascinating DLSS anti-aliasing tech).
The RX 590 8GB is a powerful card for 1080p gaming and can even dip into the 1440p realm, with performance just ahead of Nvidia's new 1660 in large part due to it's 8 GB of VRAM. Knocking over $60 off the price makes it pretty irresistible, though the sky blue color may not be for everyone. Also, this card still includes game codes for The Division 2 and World War Z, making it an even better value.
Alternately, if you do want to embrace the ray tracing future but don't want to pay a fortune for the privilege, the RTX 2060 is a great choice, the least expensive of Nvidia's RT and Tensor Core powered beasts. Or if you're looking for the best pure value proposition and to push the most frames per dollar, perhaps consider Nvidia's Geforce GTX 1660, which packs Turing architecture in a Pascal card, or AMD's Radeon RX 580