Crysis 3

ok when i run the game first time on my oc every thing high it was crap seriously ! 

i got 7 / 6 fps in game -.-

in the first level

Anti-Aliasing : MSAAHIGH(8x)

 

then i changed it to :

Anti-Aliasing : FXAA

and fps jumped to 25/ 22

in the first level

 

 

so what is the diffrence between these modes? 

 

which one is better for an amd card and nvidia card?

 

I dont think you will see any noticable difference in these modes between equivalent AMD and NVidia cards. The difference between these two modes is the way that they filter what you see to remove most sharp, jagged angles and lines. MSAA(8x) is much, MUCH more demanding than FXAA.