Is my graphics card good enough for modern games?

I wouldn't recommend GTX 660 anymore if you are thinking of playing Division 1 / 2 or future games that require lot of rendering. If anything , should your computer be desktop - try picking up cheap graphic cards such as GTX 1050/1060 which are less than $500 on the market. Even cheap as $200-300.

They can handle most new modern games at low to medium quality.