Without any commandline settings It's better, some buildings and roads disappear.
But with memrestrict When on walking everything is ok but when driving textures heavily disappear.
I Used A Vehicles Before The size is 523MB But now I'm using the same Vehicles after upgrading my computer the textures started to disappear.
My PC Specs:
Intel(R) Core (TM) i5-2400 CPU @ 3.10GHz 3.40GHz
RAM: 8 GB
GFX: Nvidia GT 440
OS: Windows 7 32 bit