The GeForce GTX 1660 Ti is Nvidia's attempt to bridge the gap between gamers who are still on GeForce 9XX (or AMD Radeon RX 400-series) cards but still don't want to drop the significant chunk of change they'd need to break into the premium-level GeForce RTX line.
Cards in the Geforce RTX family started with Rs. 32500.00 (INNO3D GEFORCE RTX 2060 TWIN X2 Graphics Card) and the new Geforce GTX 1660 Ti started with Rs 26370.00 ( Inno3d Gaming GeForce GTX 1660 Ti Twin X2 6GB GDDR6 Graphics Card )
Nvidia is offering all the improvements that came with the development of Nvidia's "Turing" (the architecture upon which the GeForce RTX series is also based) without saddling the card with the pricier extras—notably, the deep-learning and ray-tracing cores—that add to the costs associated with RTX cards.
In essence, the card is a bridge between the RTX line and the older "Pascal" cards that have dominated the mainstream market for the past several years.
GeForce GTX 1660 Ti requires one eight-pin power cable, and Nvidia recommends having at least a 400-watt power supply installed in your PC to run it.
The GeForce GTX 1660 Ti is meant to bring more-affordable, high-refresh gaming to the masses, and Nvidia claims that many of the most popular online gaming titles, such as Fortnite and Apex Legends, should have no problem maintaining 120 frames per second or higher at 1080p using the appropriate setting recommendations.
The card also features an enhanced NVEC processor that will enhance the quality of your game streams on platforms like Twitch, removing the requirement for a gaming PC attached to a separate streaming PC to maintain optimum throughput. Given the target audience of online gamers playing only semi-demanding titles who tend to stream, this could be a big difference-maker for some of those folks.
Nvidia claims gamers should expect about 1.5 times the performance found on the previous-generation GeForce GTX 1060 (the 6GB version of that card), and up to three times the performance of the card going one generation back before that, the GeForce GTX 960.
Reference : PCMAG