hey i got one xfx 4850 1gb graphic card and im thinking bout getting another one because the price dropped, and putting them in crossfire. i bought my for 150 and now its 124 ill wait a bit more for it to drop. im thinking bout keeping my rig for like 3 years or more and was wondering should i buy another one of those cards and do crossfire or should i just wait and get a better one and get rid of the 4850 i got right now. because if i get a high end one then its still gonna run with the card that has the slower speed. So if i do crossfire will it really show effect and increase the frames, and just how much better is it then just one card?