RTX 2080 vs GTX 1660

Yes, with regards to performance, Nvidia GeForce RTX 2080 outperforms, GeForce GTX 1660 by 103.4%.

When it comes to power efficiency, RTX 2080 falls behind with an efficiency score that is 44.4, -2.4% lower than that of GTX 1660 45.5. Consuming 120 watts, GTX 1660 has better power consumption to peformance ratio. The efficiency score is calculated by comparing the benchmark score with power consumption

RTX 2080 price to performance rating is lower than GTX 1660's by -4.2%. Here is more in depth overview of the price and used prices of RTX 2080 Price History and GTX 1660 Price History