Need help with blur ground texture

I don't know whether my add on scenery and other stuff is getting too large for my system to handle, my ground texture becomes very blur and looks a patch of colors, got jazzed edges too even when anti-alias is set to on. display resolution is set 800 x 600 x 32 but using 1024 x 768 x32 has little improvements during flight though the ground texture looks much better at the runway. Well my entire addon scenery is close to 30G
My system is a Intel Core 2 at 1.83 GHz. 2M DDR2 Ram with Intel graphics accelerator with 256M Video Ram
Anybody got any idea what is causing that?
My system is a Intel Core 2 at 1.83 GHz. 2M DDR2 Ram with Intel graphics accelerator with 256M Video Ram
Anybody got any idea what is causing that?