Hi tere i am curently using a hp t461 with 2g RAm and a nvidia 6600GT. My pc only has AGP capabilitys, is it worth upgrading to a 7800GS (best AGP card) or should i get a new motherboard and buy a PCIe card. I do not have tons of money, but i would like to increase gaming power of my current pc. Also would a biger power source help, i am using a 3.00ghz at the moment. Thankyou all