Hi! To make a normal desktop such as this (http://www.amazon.com/Dell-i3646-1000BLK-Inspiron-Desktop/dp/B00KE80VV6/ref=sr_1_1?s=electronics&ie=UTF8&qid=1429902438&sr=1-1&keywords=windows+desktop) or really any normal desktop a gaming computer, would I need to simply change the motherboard and graphics card? This thread is really just for fun!