hey all, i have been offered a 2 week old his 5830 iturbo to replace my 5770, he wants 180 for it. I can sell my card for about 120 so is it worth me doing this for the upgrade? will i notice a big difference? i have read a lot of places claiming this card out preforms a 5850. I would go crossfire with my 5770 like i have always planned to, but it just isnt an option cuz of the price.