Having 2k physx boxes with no fps loss is fine.

But when i run the demo all i see is a white screen, when i turn off shadows and ssao,i can get the view.(i guess the plugin needs shader model 3 ? i have 2.). PSSM hud seems to be ok.

if the reason is really, shader model 3, you should consider making aegia and pssm+pcss+ssao plugins spare.