I my opinion, the limitation of a 32 bit os is 4gig, but Poser can't handle that at all... Its only capable of adressing, whithin a 2 gig space. Even better, its not capable of running on a workstation whith 4 gig installed without a patch.. rofl! But! who of you guys, can really say poser needs more than 2 gig ram? I'm rendering bigger animations with maya and poser.. Poser has more ram needs, but 2 gigs should last 4 a while :/ Poser itself has a realy bad program strukture in my opinion. Its terrebly slow, it shuts down while rendering all the time! It has bugs over and over and it doesent support dual cpu prozessing at all. To get back 2 the headline! Surely poser will run faster on an opteron system, not caused by the 64 bit architekture, but by the huge ammount of the opterons L2 cache. so long..