ok i just ordered a new computer im going to use it for gaming it has amd 4800 x2, i also bought a nvidia gforce 6800xt 258 mb graphics card. Now i thought this was a good graphics card, i ordered the computer almost a day ago, so i can still cancel. But my friends says that i shouldnt get a 64 bit graphics card and it will slow down my system and they are too ahead of there time. Is this true, should i cancel my order and get another graphics card. is there certain stuff thats good or bad about it. please help i dont know much about computers.