https://wccftech.com/nvidia-geforce-gtx-1660-ti-memory-clocks-speeds/

This is an odd post. You are going to be reading a collaborative effort of leaks containing information from my own sources as well as information that has appeared on the internet before – in which case the credit has been given to the respective sources – Tom’sHardware Germany and VideocardZ. There are also some new details in the mix that I will be throwing in – such as the clock speed, memory specifications, and PCB details. I have split the article into two parts: confirmed and (educated) speculation. Let’s begin with the facts.

The GeForce GTX 1660 will have 6GB of GDDR5 memory with a 192-bit bus. The memory will be clocked at 4000 Mhz while as the clock speed will be 1530 Mhz base and 1785 Mhz boost. The card will feature the TU116-300 die and the board number is PG165.