I have a Gigabyte motherboard GA-Z68A-D3H-B3 with Intel core I5-2500K@3.3 GHz and 2 used graphics cards: GE Force GTX460 and ATI Radeon HD5670. Please, wich one will give me the best performance, I am not a gamer, I am a day trader and I will use it for 2D charts of the stock market.