When i put this computer together, i was short on cash and bough the Asrock core 2 dual board because i had a lot upgrading potential (ddr and ddr2 capable, agp and pcie, a lot of processor support.) I was using an old geforce 6600 pcie express card in it and it finally fried. I have been shopping around for a card that will be equal to it or perhaps a little faster, but i am having trouble finding many PCIE x4 cards. My question is this: Should I buy a PCIE x1 card, PCIE x16, or should i just get a good AGP 8x? and what are the pros or cons of choosing each one?