ok thanks for information, i think phoenix31tt was right about my 5830 card, because i do remember on ATI website when downloading drivers the 5830 was in a separate group.
as for buying buying a diamond card, i didn't want that brand but the sapphire and XFX 5870 cards have been sold out for almost 2 months now so i just got tired of waiting and ordered the diamond as it was the only one available at the time. my 5830 was from sapphire and isn't even 2 weeks old yet, so i managed to get it sold pretty quick, its pretty powerful and runs BC2 at 1920x1200 great, just if u put on AAx8 it starts to slow down =/