So i just bought the xfx 5770 gpu (which is on its way). i have 4 gigs of ddr2 g skill ram, dual core at 2.4ghz with the zalman 9700led cooler, 250gb hdd, 500w psu, rosewill conqueror case, windows 7 ultimate. For gaming on a 19" widescreen monitor will i need to upgrade to a quadcore or six...