So i'm building a gaming pc. I'm not sure if i should go with a 790i board with DDR3 memory or a 780i board or below with DDR2 memory. I'm still new to building a gaming pc and i'm not sure if DDR3 or DDR2 setups are better for gaming as far as performance and fps. I mainly play World of Warcraft and COD4. Would much appreciate someone more knowledgable with memory to help me out.