My game currently is playable, i have installed the Rage performance Driver from AMD, also i added this fix

seta vt_pageimagesizeuniquediffuseonly2 "8192"
seta vt_pageimagesizeuniquediffuseonly "8192"
seta vt_pageimagesizeunique "8192"
seta vt_pageimagesizevmtr "8192"
seta fc_maxcachememoryMB "1024"

however, after adding this fix i no longer get crashes during load screen, but now i am getting weird blue spots looking at the far distance.. like on ground and mountain and rocks etc...
i never got these blue spots before adding that fix though, but game then would crash... i guess im gonna have to live with these weird blue looking spots for now =(..

my spec is

AMD Phenom™II X4 965 @ 3.40 GHz Black Edition
ATI HD 6870 single GPU
Windows 7 DirectX11

anyone know how i can get rid of the blue spot would then make the gaming experience nearly perfect. thankx lots