First, you won't use higher than 4x AA in 1920 'cause it doesn't really make any apparent difference at this high resolution (assuming you are not displaying on a 10 feet projector) - rule of thumb says the lower the resolution the more AA you need.
Second no chance you'll take up 1GB - if I'm not mistaking baseline 1920x1200 8x SSAA means 72MB memory footprint; you have to combine with something else but I can't see any chance to hit 1GB with pp... you need an awful lot of textures etc to fill up that giant memory.![]()
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