hello!! well that's my PC: Asus Rampage Formula X48 E8400 @ 3.8ghz 24/7 1.23Vcore 2x1gb supertalent @ 1000mhz 320gb western digital Istar USA PSU 750W tcPD1 8800gt 512mb Well, i want to buy a new graphic card for my computer. my res is 1680x1050. I live in argentina, so, the prices are alot Expensiver than in the united states. i can buy at the same price an PNY 9800GX2 Overclocked at 675Mhz /memory clock at 2100Mhz, or a Sapphire 4850 Crossfire. obviously im going to put 2 gb more to my computer. Which performs better? are at about the same price. Help!