RTX 4090 vs RX 6600 XT

Yes, with regards to performance, Nvidia GeForce RTX 4090 outperforms, Radeon RX 6600 XT by 270.5%.

The RTX 4090 is more energy-efficient considering its peformance, consuming 450 watts to produce 3DMark score of 35966. By comparing its benchmark score to its power consumption, we get an efficiency score of 79.9. RX 6600 XT's efficiency score is 60.7, 31.7% lower, making RTX 4090 the smarter choice in terms of power consumption.

RTX 4090 price to performance rating is lower than RX 6600 XT's by -45.5%. Here is more in depth overview of the price and used prices of RTX 4090 Price History and RX 6600 XT Price History