Socket 775 so will not take any modern i3/5/7 CPU.
What you need to look for is a 2nd hand Intel Core 2 Quad.
http://www.cpu-upgrade.com/mb-Intel_%28chipsets%29/G41_Express.html[/quotemsgt
thank's and one more thing what make the game run faster is it the GPU or the CPU i want to know what is the more
importent thing to mkae games run high setting and not slow