After searching for a way of disabling these "white pixels", it seems this annoying effect actually has a name: specular aliasing.
It occurs also in other games like NFS and Call of Duty, http://forum.ea.com/eaforum/posts/list/1907434.page
Also a quote from Hardocp.com : "In Need For Speed Shift, AA is not a make-or-break feature. We are glad that AA works, and we are glad that we can configure it from within the game. But the biggest problem with IQ in NFS Shift is not edge aliasing, it is specular aliasing. Specular aliasing is a jagged edge that is produced by a lighting reflection. Often, specular aliasing can appear in the form of sparkly white dots on a highly detailed reflective surface. http://www.hardocp.com/image.html?image=MTI1NzcxMDM2MTdkTmMyTlc1U09fOF8xOF9sLnBuZw==
On the grille of the car in the above picture, there are some white dots and some jagged white lines where the chrome is reflecting light. This effect appears throughout NFS Shift. The only way around it, in fact is to use AMD’s super-sampling AA, which drastically reduces performance as well as texture clarity, or to use the narrow-tent or wide-tent custom AA filters in AMD’s Catalyst Control Center, which also reduces texture clarity.Unfortunately, there is not yet a very good solution for specular aliasing."
So I was wondering, is there anyway to disable specular aliasing, since I tried about everything, including disabling AA, in the drivers and in-game, althought the problem still occurs and makes the game a lot less realistic=enjoyable.
Arma 2 looked much better on my old previous card, Geforce 9800GTX.
My other question is if people have the same issues with ATI cards?
Thanks a lot.