what is the best combo for core 2 duo E7500?

Jun 13, 2018
1
0
10
i have a msi g41m p21 motherboard.
Core 2 duo E7500
4gb ddr3 ram
500 watt psu.

Now my question is can i use a gpu for the games that released on 2013-2014.
And if i upgrade it to a core 2 quad q9550, can i play pre 2013 games without gpu???
and is the processor supported for my motherboard?