No, in terms of performance, Nvidia GeForce GTX 1660 is slower than Nvidia GeForce GTX 980 Ti. Nvidia GeForce GTX 980 Ti outperformes Nvidia GeForce GTX 1660 by 6.2% in 3Dmark benchmark.
The GTX 1660 is more energy-efficient considering its performance, having power consumption of 120 watts and a 3DMark score of 5454. By comparing its benchmark score to its power consumption, we get an efficiency score of 45. GTX 980 Ti's efficiency score is 23 .So GTX 1660 leads by 95.7%, making it the smarter choice in terms of power consumption.
When considering value for money, GTX 1660 offers a better deal than, GeForce GTX 980 Ti by 214.3%.