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Updated
Nvidia GeForce 2080 Ti is the worlds fastest consumer graphics card. Though expensive, it's amazing at high-fps 4K gaming.
Specs
Pros
Pro Best performance
The RTX 2080 Ti has the best performance out of all cards available on the market. The card is great for gaming at high resolutions while not sacrificing frames per second(fps).
For overall performance measures, the Nvidia's Founders Edition scored 25,039 in the 3DMark Firestrike test. For comparison, the second best result is 22,678 by Nvidia Titan XP. The well-known Nvidia GTX 1080 Ti scored 22,246.
This RTX 2080 Ti can run the newest games at outstandingly high fps. Techradar found that it runs Middle Earth: Shadow of War(1080p resolution) at 151 fps. Total War: Warhammer II(2160p resolution) runs at 46 fps.
While the RTX 2080 Ti can not break the 60 fps benchmarks for gaming in 4K, it still provides the best performance you can currently get.
Pro Relatively low power consumption
The card consumes relatively little power while gaming, taking into consideration its performance.
According to Techradar the card's max power draw is 268.23 Watts. The same measure for Nvidia Titan XP is 283.28 and for Nvidia GTX 1080 Ti it's 288.42.
Pro Cool card
The card is relatively cool. Overheating and issues related to this should not be a problem.
According to Techradar the card's maximum temperature is 80 degrees Celsius. For comparison the Nvidia Titan XP can reach 84 degrees, same temperature as the Nvidia 1080 Ti.
Taking into consideration the power of the card, it is very cool in temperature even under heavy load.