Ultra high or Very High.. whatever

Fasz, have you tried any different videocard drivers? Are you sure that AA (MSAA) isn't forced on your videocard control panel and not just in-game?

I have the latest video card drivers and I haven't try different version , I look into the control panel :
- anti aliasing & anisotropic are set on " application managed "
- the adaptive anti aliasing is disabled
- mipmap detail level is set on high quality

how about your other games? are you getting normal scores/fps when compared to similar systems (ie other HD4850 users)?
I was kinda expecting similar fps to mine since you are playing on a lower resolution, that or the X2 6000+ is limiting your HD4850's performance? (but it should be enough as the X2 6000+ is still a powerful processor)

I think its only Nba 2k9 who have this probleme because i can play GTA 4 / PES 2009 / at max resolution ( 1400 *1050 ) saint's row 2 got the same probleme as 2k9 ,playing with higher resolution but have a low frame rates but I see on different forums its due to a " bad calibration " for the PC users

set it to ultra high then lower the crowd....the crowd eats up alot of FPS....i have everything on max except for the crowd details...and everything runs smoothly

That didn't help me. With crowd on medium and players on ultra high, still ~20 FPS. With crowd and players both on high it's over 30 FPS after installing the patch.

I can also play the game with everything on max except for the crowd details in 30ftps and sommthly like Spree#8.

Do you have players on ultra high or high?

Players on Ultra High.