Based on the specifications you provided, it should be possible to use a GTX 1660 Super with your YGT Top 1 750W power supply. However, it is important to note that the quality and efficiency of your power supply can affect the stability and longevity of your system.
The YGT Top 1 750W power supply is not a well-known brand, so it is difficult to assess its quality and reliability. We recommend that you check the power supply's specifications and read reviews from other users before making a decision.
It is also important to note that the GTX 1660 Super requires a six-pin power connector. Make sure that your power supply has this connector, and that it can deliver enough power to the graphics card.
In addition, you should take into consideration the thermal management of your system. Make sure that your case has adequate ventilation and that your CPU cooler is capable of handling the additional heat generated by the graphics card.
Overall, if your power supply can deliver enough power and is of good quality, and if your system has adequate thermal management, then it should be possible to use a GTX 1660 Super with your PC. However, we recommend doing further research before making a decision, and consulting with a professional if you are unsure about the compatibility of your components.