So i have a stock 2010 2.93 i7 imac. While i render a video (Premiere & FCPX) it only uses about 66% of my cpu. Whats the holding my cpu back? When I look at my system memory it shows this. SO would adding more memory make my computer use more of its cpu? if so how much? Im jkinda on a budget so could just getting another samsung (stock memory according to macsales)4gb kit giving me a total of 8gb be enough or should i look to add more?