https://www.pcgamer.com/nvidia-geforce-gtx-1660-review/

Architecture: TU116Lithography: TSMC 12nm FinFETTransistor Count: 6.6 billionDie Size: 284mm2SMs: 22CUDA Cores: 1,408Render Outputs: 48Texture Units: 88Base Clock: 1530MHzBoost Clock: 1785MHzFP32 GFLOPS: 5,027Memory Speed: 8 GT/sBus Width: 192-bitGDDR6 Capacity: 6GBMemory Bandwidth: 192GB/sTDP: 120WPrice: $219

Nvidia's TU116 GPU raises the question of just how far down Nvidia can go with the Turing architecture. The first slate of Turing GPUs are the best graphics cards around, featuring real-time ray tracing and deep learning cores, but the TU116 used in the GTX 1660 Ti cut those in order to target a more mainstream price. The GTX 1660 trims things even more by opting for readily available (ie, cheaper) GDDR5 memory instead of GDDR6. Along with fewer CUDA cores and other elements, the result is exactly what you'd expect: a slightly slower but even more affordable GPU.