Yes, with regards to performance, Nvidia GeForce GTX 1660 SUPER outperforms, Radeon RX 6400 by 67.8%.
When it comes to power efficiency, GTX 1660 SUPER falls behind with an efficiency score that is 48.6, -28.8% lower than that of RX 6400 68.3. Consuming 53 watts, RX 6400 has better power consumption to peformance ratio. The efficiency score is calculated by comparing the benchmark score with power consumption
When considering value for money, GTX 1660 SUPER offers a better deal than, Radeon RX 6400 by 32.1%. Here is more in depth overview of the price and used prices of GTX 1660 SUPER Price History and RX 6400 Price History