I am thinking of building a Gaming PC and i am wondering if some components work better when matched with other components. I am not talking about compatibility issues. For example would an i5 4670 work better with a GTX 760 or with a R9 270x, and also would this CPU perform better with a certain compatible MoBo or would just any compatible Mobo perform the same. I hope i made my question a bit easier to understand. Also, is there anything i can do to increase the "lifespan" of the PC i am going to create? I am asking this because i keep hearing that pre-built brand PCs last longer than the custom made ones and are sure to perform well because they were tested for a long time.