Ao k parece e mesmo assim..o jogo limita as opçoes grafikas..e apenas placas de topo kom 512 de ram podem usar ixu
And here's where we run into some difficulties. Given the type of eye candy GRAW uses, there are already many complaints about the lack of Antialiasing to smooth out the jagged lines. There are issues around the way the game prevents all but the latest 512MB graphics cards from using High Quality textures, and of course there are the usual issues around low framerates, mouse lag, crashing and so on. I've prepared this guide as a means of covering all these issues and providing all the known tweaks and solutions in one central source. Give it a read through and see if it helps you get more enjoyment out of the latest tactical shooter to hit the streets
Antialiasing: Note, due to the type of Deferred Lighting method used by the developers, regardless of your Post Effects setting, Antialiasing is not possible in the game - even if you disable Post Effects, or try to force Antialiasing in your graphics card control panel. This is an unfortunate and contentious aspect of the game, since the gameplay relies a great deal on identifying small movements in your surroundings; something which the lack of antialiasing makes much harder due to jagged edges constantly moving and shimmering. However it is not resolveable as far as I know, so it's unlikely to ever be "fixed" by patching. Turn off any forced Antialiasing in your graphics card control panel, as it will not work regardless of which graphics card you use, and can only cause slowdowns and problems with GRAW.
Fonte
http://www.tweakguides.com/GRAW_1.html