Hi i have found that if you set to min of 3 times your ram. so you have 1 gig set it to 3 gigs windows will take half of that for house keeping and let you use half. so you will have the equivalent of 2.5 gig mem for renders and so on. but dont go crazy as to large and it slows windows down as it keeps track of it just like ram, so 3 to 6 gigs max setting for the Vert mem. and make sure its set on the same drive as your poser if you have a multi drive set up like me. hope this helps Vel