Lets take a quick look at what AnandTech has to say about NVIDIA's newest Turing card. Apparently, this is the smallest performance jump in the "SUPER" refresh. While the previous cards offered about 15 percent better performance per dollar than their predecessors, the RTX 2080 SUPER offers an improvement of just 8 percent. It's the best option in its price segment, but the site wonders whether it's really worth $200-$300 more than the RTX 2070 SUPER and Radeon RX 5700 XT:
Equally spoiling matters from the other end, however, are the RTX 2070 Super and Radeon RX 5700 XT. These cards are distinctly slower than the RTX 2080 Super – the 2080 leads the 2070 by 14%, for example – but then they’re $200 and $300 cheaper respectively. As a result, while they aren’t in the same performance tier, they offer even better performance for the money than the RTX 2080 Super. Spoilers are always hard to assign an absolute value to, but I will say that the RTX 2080 Super is almost overpowered for 1440p; at least unless you’re using a high refresh rate display.